Cork Yoga Block: 2 lb; 4" x 6" x 9"Lean Cork Yoga Block: 1 lb; 3" x 4" x 8.5"Recycled Foam Yoga Block: 1 lb; 4" x 6" x 9"Recycled Foam Yoga Mini Block: 0.4 lb; 4" x 4.5" x 6"unBlok Recycled Foam Yoga Block: 0.8 lb; 4" x 6" x 9"Read on for our guide on yoga blocks: Yoga Blocks - The Foundation of Every Practice.