These are the best options for quick, individual purchases for DIY or art projects.
: Carries a standard selection of white and green craft foam shapes and blocks. where to buy polystyrene foam blocks
: Offers a wide variety of "CraftFōM" and "FloraFōM" blocks in various sizes, from small 3-inch cubes to larger rectangles (e.g., $15.99 for a 4-pack of 6x6x6-inch blocks). These are the best options for quick, individual
: Stocks polystyrene blocks primarily for floral arrangements and sculpting, often sold in multi-packs. Online Marketplaces & Specialty Suppliers
For specific densities or large "construction-grade" blocks, these specialized sellers are often more cost-effective.
& Lowe’s : While they primarily sell large insulation sheets (XPS "pink" or "blue" foam), these are frequently used by crafters who stack and laminate them to create thick blocks for carving. Online Marketplaces & Specialty Suppliers