How to Make a Bolster Pillow Insert
You love the look and support of a bolster pillow, but finding the perfect size, firmness, and price can feel impossible. Store-bought inserts often flatten quickly, cost too much, or never quite match your decor. The good news is that learning how to make a bolster pillow insert at home is simple, affordable, and fully customizable.
With basic sewing skills and a few common materials, you can build a durable, plump insert tailored to your exact needs. In this guide, you will learn how to choose filling, cut and sew fabric, and stuff your bolster for long-lasting comfort. From soft polyester fiberfill to firm foam cores, every step is covered.
Pick the Best Filling for Your Bolster Pillow Insert

The filling you choose shapes how your bolster feels, supports, and lasts over time.
Use Polyester Fiberfill for Soft, Plush Support
Polyester fiberfill is affordable, hypoallergenic, and easy to find at any craft store. It creates a soft, cloud-like feel that works well for decorative bolsters or light back support. To get the best results:
- Layer the fiberfill evenly as you stuff
- Pack it firmly to reduce sagging
- Fluff the insert weekly to keep its shape
Pro tip: Choose high-loft, hypoallergenic fiberfill for lasting resilience. Avoid over-stuffing, which can stretch or burst seams.
Choose Foam Core for Firm, Hotel-Style Support
For a rigid, unyielding bolster that never flattens, use cylindrical pillow foam. This option is ideal for yoga bolsters, lumbar support, or structured bed pillows. To prepare foam:
- Cut foam to length using an electric knife or serrated blade
- Wrap it in a thin cotton sleeve to soften the feel
- Slide the wrapped core into your finished cover
Foam holds its shape for years and requires no fluffing.
Combine Fillings for a Custom Feel

Mixing materials gives you the best of both worlds. Try these combinations:
- Foam center wrapped in fiberfill for softness with structure
- Poly pellets added to fiberfill for gentle weight
- Batting layered around foam to prevent rubbing sounds
This hybrid approach delivers cozy comfort
