It says the panels are each 2.875" square. (link did not work)
Item #: 62358-N
Item Name: I See
Categories: Cloth Books Toys; Juvenile
VIP, 100% Cotton Fabric, 38 Squares 2-7/8" Square of Things to Find. Makes Giant Pillow or Playmat. Priced & Sold by the Panel.Indicate How Many Panels You Need, Not Yards.
Price per yard: $4.99