upholstery foam 30x80

A sheet of upholstery foam 30x80 is one of the most useful starting points for long, narrow seating projects. At 30 inches wide and 80 inches long, it suits daybed cushions, window seats, storage benches, and banquettes, and it can be trimmed down for smaller pads with a sharp electric knife.

Choosing the Right Foam Sheet

Before you buy, measure your seat or frame carefully and decide how the cushion will be used. Everyday seating calls for different foam than an occasional reading nook.

Thickness

Thinner sheets work well for bench pads and headboards, while thicker foam gives deeper, more cushioned seating on daybeds and window seats. Consider how high you want the finished seat to sit.

Density and Firmness

Density relates to durability, while firmness describes how the foam feels. High density upholstery foam generally holds its shape longer under daily use, making it a smart pick for seats that get sat on often.

Finishing Your Cushion

• Wrap the foam in batting for softer, rounded edges.
• Pair it with a durable upholstery fabric that fits your space.
• Add a zipper to make the cover removable for cleaning.

Ready to start your project? Browse our 30 x 80 foam sheet options below and find the right fit for your next cushion.