Best Semicircular Throw Pillow Inserts in 2026

DECORATIVE PILLOWS INSERT: HIPPIH throw pillows insert are suitable for any elegant pillow cases to decorative your room, particularly perfect for our 18 x 18 inch pillow covers.

VACUUM PACKING: HIPPIH 2 pack throw pillow inserts make shipment by vacuum packing, you need to let them naturally recover for a few days, or exposure in the sun for one day, and then they would restore fluffy

CORRECT MEASUREMENT METHOD: HIPPIH pillow inserts measured in 18 x 18 inch. The right way is measuring from one side seam to the another seam by tape.

-Made of 100% ultra soft polyester fiber filler.

-Pillow insert size:18″ x 18″,45cm x 45cm.Pillow cover a little bit smaller than 18x18in may reach the best performance of the insert.

-Easy to clean and dry:Machine washable.Please wash it in gentle cycle with warm water and hang it up to dry.

THROW PILLOW INSERTS - The pack of 4 superior quality pillows is expertly woven and sewn to perfection.

VACUUM PACKAGING - Our pillow inserts are compressed packed due to shipping purpose, it might appear as one large pillow.

MEASUREMENTS - Each expertly designed pillow measures 18 by 18 inches

SQUARE PILLOW INSERT: The package includes 2 pieces of 20-inch by 20-inch pillow inserts with a Cotton Cover, which is breathable and skin-friendly.

WELL MADE： Our pillow inserts have a 100% cotton cover and sufficient 3D high-quality fillings, so they are durable, soft yet firm enough for back support, providing the best experience for you

WIDELY USE: Great cushion, sham stuffers for inserting into your favorite throw pillow covers to add accents to your room's déco, Versatile for chair, bed, couch, sofa, office, car, etc.

Elegance Pillow Insert: Throw Pillow Inserts are a necessity for your family. It looks great and feel comfortable, using as cushions to your sofa couch or bed for lumbar support and decor your room.

High Quality: The pillow surface is made of high-quality brushed fabric, which is filled with Hypoallergenic High-Resilient PP cotton. It does not cause provoke any allergic reactions from your family and It also feels comfortable and resilient.

Decor your Room: For best display this insert is recommended for a little bit smaller than 18x18in decorative pillow covers may reach the best performance of the insert! You can put the pillow in your sofa, living room, bedroom to decorate, make your room eye-catching. (We have a lot of decorative pillow covers sold separately!)

For best results for your covers. Pillow insert is better to oder 2 sizes up to provide a plump and full pillow from corner to corner. Please measure the size from seam to seam and usually the pillow will be much smaller after expanding.

22x22 square throw pillow inserts, set of 2, use as an insert for decorative shams/ Couch shams/Sofa pillows/ Bedroom shams.

This item is measured 22x22,37oz feather and down filled in a durable 100% 233TC cotton fabric with downproof stitch preventing feathers from poking out and full pillow from corner to corner.

Premium Quality: Filler is 7D hypoallergenic fiber with good breathability and softness. The cover is smooth polyester fabric, comfortable, durable and skin-friendly.

Soft but Supportive: Polyester fillings are well-filled so it does a good job keeping the shape brilliantly. Plump enough for lumbar support. You will feel great to lay your head on or use as a back support in a chair or sofa.

Great Decorative Pillows: Easily fluffy up to regally display your covers. You could change your pillow covers which you like to go well with any home decor in different seasons. Versatile for bedding, couch, sofa, office, etc.

Made in the USA - Phantoscope’s pillow inserts are manufactured right here in California, we use American-made virgin micro-fiber filling and high-quality polyester covers that make our pillows longer-lasting, hypoallergenic, and odorless. Every purchase is a show of support for American manufacturing.

High Filling Capacity - Our throw pillows contain 10% more filling than most pillows on the market, and they are also a half-inch larger. We promise that every throw pillow insert is filled to at least 90%, ensuring that all corners are perfectly fitted.

Soft and Resilient - We utilize our patented filling technology, allowing us to fill our pillow forms with high-grade 7D fiber that provides extra resilience and comfort while remaining elastic. Our couch pillows are guaranteed to maintain their shape and provide adequate support without ever developing hollow areas.

Warm Hint: For optimal use, please shake vigorously up to fully fluff up or put them in the Dryer with or without Tennis balls, Low heat for few minutes to get it back to its normal full fluffy shape.

Premium Material: Fillers are made of great 7D fiber, better than common filler. Well-filled so it can keep the shape brilliantly. Outer parts are made of soft and durable polyester. A hypoallergenic stuffer pillow insert with no odors

Comfortable to Lean Against: They are fluffy and hold up well, ensures enough softness and firmness to lean against. You will feel great to lay your head on or use as a back support in a chair or sofa. Do no sag

Pillow Inserts：There are 2 decorative 18"x18" pillow inserts coming with a pair of comfortable cotton covers in 1 package.

Vary Options:Different sizes of throw pillow inserts provide vary choices for different requests,you could use them at many places,sofa,chair,bed and outdoor.

Elaborate Production:These pillow inserts are made of 100% cotton and 4D high-quality filling,so they are very soft and durable,at the same time they can rebound quickly,provide the best experience for you.

26 x 26 inches, Pack of 2, Square, recommended with pillowcase one size (2") smaller than pillow filler for an over-stuffed look

Filled with polyester microfiber, extra fluffy, firm and supportive

Premium poly fabric cover trimmed elegantly, breathable, soft, resilient and none-allergenic

Ultimate in softness and versatility | Give your home’s shams a touch of class that will last for years | Use the Pillowflex pillow insert anywhere in your home that may need a pillow… couch, sofa, love seat, beds, day beds, reading nook. You will even love sleeping on it. We manufacture 60+ sizes of pillow inserts to fit any pillow cover including accents, shams, travel pillows, lumbar pillows, bed pillow cases and even kid sizes!

PERFECT SIZE: Please use proved size chart image! Start by measuring your shams, pull tight along the outer seam and measure corner to corner, this should be done for all shams even if size is marked. Please note your insert must be larger than your sham to correctly fill the corners of the sham and give them a nice full look. This 24"x24" inch pillow insert is recommended for use in a 22"x22" inch sham.

ALLERGY FREE: Our ultra soft pillow is made from a faux down polyester fiber that has the same feel, weight and characteristics of traditional down. Our line of synthetic pillow forms are cruelty free with no feathers to poke you. These pillows are odorless, lint and dust-free, and free of flame retardant chemicals.

18 x18 PILLOW INSERTS - Pack of 2 decorative throw pillow inserts, each featuring a soft and durable cotton cover. Each pillow insert measures 18 by 18 inches.

PREMIUM QUALITY - Our pillow inserts boast a 100% cotton cover and ample 3D high-quality fillings. The breathable and skin-friendly materials provide optimal support, ensuring a comfortable experience whether you're lying down or leaning against them.

VERSATILE USAGE - These square pillows are multiuse wonders, suitable for sofas, chairs, beds, and more. They can be easily inserted into pillowcases of various styles, allowing you to effortlessly decorate your room to reflect your unique taste.

Premium Quality: Filler is 7D fiber with good breathability and softness. The cover is smooth polyester fabric, comfortable, durable and skin-friendly.

Soft but Supportive: Polyester fillings are well-filled so it does a good job keeping the shape brilliantly. Plump enough for lumbar support. You will feel great to lay your head on or use as a back support in a chair or sofa.

Great Decorative Pillows: Easily fluffy up to regally display your covers. These are great pillows for inserting into your favorite covering to add accents to your decor. Versatile for bedding, couch, sofa, office, etc.

Filled with new polyester

Cotton cover

Price includes 2 pillow inserts, 18x18",square

Material: Made of high-quality polyester fiber. The filler is made of great 7D PP material, soft and comfortable, better than common filler.

Size: Each pillow insert is 18x18in/45x45cm. Because it's made by hand, there may be an error of 1-2cm.

Multi-purpose: Set of 4 hypoallergenic throw pillow inserts for your home decoration. Hypoallergenic design is suitable for sofa, living room, bedroom, balcony, garden, farmhouse, patio, kitchen, office, etc.

PREMIUM MATERIAL : The outer layer of our soft pillow inserts is made of High thread count Premium Poly-cotton fabric which is comfortable, breathable, and skin-friendly. The cushion is filled with 100% hypoallergenic microfiber filling which makes our pillows long-lasting and odorless.

STITCHING : Our throw pillows are tightly stitched and patented filling technology & use of High-grade fiber guarantees no hollowness in pillow forms, proving ultra-toughness and support that provides extra resilience and comfort while remaining elastic maintaining their shape.

HIGHER FILLING : Our range of ultra-soft decorative pillow contains much more microfiber filling than most pillows in the market, makes it more fluffy & prevent lump formation, ensuring that all corners are perfectly fitted & helps the pillow retain its shape for a longer time. Relax comfortably on these luxurious super soft pillows.

👑【Premium Material】Made of high-quality upgraded microfiber polycotton, this type of material will recover it's fluffy shape. Pat the pillow inserts with your hands until it gets fully expanded to make inserts fluffy again. The polycotton will lose elasticity temporarily through long time vacuum compression. These sofa throw pillow inserts are comfortable, skin-friendly, and breathable. And being well stitched, these square pillows are durable and sturdy for long-time use.

👑【Ultra-Soft & Super Plump】Dreaming of having a relaxing leisure time? It’s time to get these decorative pillow inserts! Each couch pillow is filled with 440g of top-quality polycotton, ensuring excellent softness and fullness, providing the perfect support for your head and waist.

👑【Versatile Usage】These polycotton throw pillow inserts sets are suitable for various occasions such as sofa, couch, living room, bedroom, office, club, restaurant, and so on. It is also a great gift idea for your friends or family on Christmas, Thanksgiving, Halloween,Fall , etc.

SOFT YET SUPPORTIVE THROW PILLOW INSERTS- Filled with 100% soft polyester stuffing, ACANVA pillow inserts 16x26 inches not only provide softness, but also have high resiliency with durability. Provide you with comfort ,head, back and lumbar support.

GREAT FLUFFY DECORATIVE PILLOWS FOR SLEEPING, READING ECT.-Generously filled with quality polyester fiber, and sewed with high thread count fabric, ACANVA 16 x 26 pillow inserts are perfect accent for sofa, couch, chair, seat, living rooms,bedrooms and office, which can be used both indoors and outdoors.

100% SKIN-FRIENDLY & BREATHABLE WEAR-RESISTANT MATERIAL-Our 2 pack euro pillows insert are made of 100% microfiber fill, offers a smooth and soft hand feel and skin friendly to your family and pets. It is perfect for sleepers who are allergy prone. Provides the most comfortable feel to your head and back as you unwind after a tiring day.

This price includes two cotton fabric pillow inserts, the size is 18 x 18 inches. The size are measured from seam to seam.

These soft down and feather decorative throw pillow inserts provide cozy and firm support when you're in a seated position. For use with all types of shams & covers.

These cotton fabric throw pillow inserts are more durable than polyester fabric.

18x18 PILLOW INSERT: Our decorative pillow set comes with a pair of square 18 x 18 inch soft polyester cover sofa pillow inserts.

Multiuse:This set of two square pillows can be used as chair pillows,bed pillows,sofa pillows,they can decorate your room and make it look more warm and elegant.

Excellent Craftsmanship:Our pillow inserts is made of Soft Polyester cover and 7D high quality filling,so you could feel it very soft and fluffy.

Ultra soft and durable: These throw pillow inserts are made using high grade 100% polyester microfiber that is super soft and plush, very sustainable for long term use

Suitable for all places: Plush and fluffy enough for use in all seasons, good to use in bedroom, sofa, chair, office, car and etc.

Dimension: 18 x 18 inches square, 45 x 45 cm, vacuum plastic bag packaged

♔Fill-in material - High-quality three-dimensional 7D PP Polyester, good breathability and softness. (High quality pure white Polyester) Cover material: brushed chemical fiber fabric, comfortable, durable and skin-friendly.

♔Soft but Supportive - Polyester fillings are well-filled so it does a good job keeping the shape brilliantly. Plump enough for lumbar support. You will feel great to lay your head on or use as a back support in a chair or sofa.

♔Great Decorative Pillows - Easily fluffy up to regally display your covers. You could change your pillow covers which you like to go well with any home decor in different seasons. Versatile for bedding, couch, sofa, office, etc.

𝐌𝐀𝐓𝐄𝐑𝐈𝐀𝐋: Our 22x22 pillow inserts are expertly filled with 95% feather, 5% down, covered with a top quality, 233 thread count fabric. made of 100% Cotton, with downproof stitching, to prevent feathers from poking out.

𝐌𝐀𝐃𝐄 𝐈𝐍 𝐓𝐇𝐄 𝐔𝐒𝐀: Every product in the ComfyDown catalog, is proudly made right here in the United States. Thank you for supporting American manufacturing! You will love the difference!

𝐇𝐎𝐖 𝐓𝐎 𝐌𝐄𝐀𝐒𝐔𝐑𝐄: Pull tight along the outer seams of your sham, then measure the middle of your sham, from seam to seam - height and width - to find the correct insert needed.

Made in USA or Imported, Filling in California Facility.

Machine Washable and dry. - Filled with 100% soft polyester, Non-allergenic, soft and sumptuous yet firm, Shell is Polyesters Nonwoven fabric.

Use in home or in a outdoor cover. Resilient and refluffable.

Made in USA or Imported, Filling in California Facility.

Machine Washable and dry. - Filled with 100% soft polyester, Non-allergenic, soft and sumptuous yet firm, Shell is Polyesters Nonwoven fabric.

Use in home or in a outdoor cover. Resilient and refluffable.

Filling with down feather provides comfortable support.

The couch pillows are made from cotton cover with double layer fabric, skin-friendly and more durable.

Price includes 2 pillow inserts, 18X18 inches. The size is suitable for 18x18 inches throw pillow cover. If your throw pillow cover is 16x16 or 17x17 inches, the 18X18 inches pillow insert will make it more fluffy and firmness.

High quality, hypoallergenic polyester fiberfill for comfort and support

Filling evenly distributed to maintain shape

Measurement: 18 x 18 inches square, full 450g hypoallergenic poly-fiber filler

🌙 12 x 16 Inch Premium Quality Pillow Inserts: Plush, durable, and long lasting for a luxury feel without the luxury price tag. Filled with breathable polyester fiber filling and covered with a soft poly cotton fabric, our lumbar pillows will be the perfect accent for your living space.

🌙 Improved Posture: Our lumbar support pillow conforms to the natural inward curve of your spine, encouraging sitting in an upright position for optimal spine alignment.

🌙 Pain Relief: Lumbar pillows provide lower back support in lying down or seated positions by improving body alignment, evenly distributing your weight, and removing pressure from key pain points in your body, including your neck, shoulders, spine, back, hips, and knees, allowing for muscle relaxation and decreased tension and strain.