Amazon.com : Yoga Blocks 9''x6''x3'', 4 Pack High Density Yoga Brick Foam Blocks to Improve Strength, Flexibility and Balance, Light Weight and Non-Slip Surface for Yoga, Pilates and Meditation : Sports &
Sunshine Yoga 4" Yoga Block (4" x 6" x 9") - 10 Packs
Amazon.com : Nu-Source Yoga Block (2-Piece), Purple, 9 x 6 x 4-Inch : Sports & Outdoors