Amazon.com: Max Shape Pack of 2 Large Size Floral Foam Blocks for Fresh and Artificial Flowers (9” L x 4” W), Wet Florist Foam Blocks for Wedding Holiday Decorations (2 Pack) :
Amazon.com: Oasis Floral Foam Advantage - Foam Bricks - Craft Blocks - Foam for Dry Flowers - Lightweight Green Foam - Florist Foam for Arrangements and Decorations - 6 Pack : Arts, Crafts & Sewing