A: Hi, The Small Dark Grey Square pieces (2 of them) are each 3.5" x 3.5" x 2" high The Medium Grey Rectangular pieces (2 of them) are each 6.9" long x 3.5" wide x 2" high The Light Gray Rectangular pieces (3 of them) are each 10.5" long, 3.5" wide and 3" high Thank you for your interest in the Joseph Joseph 7 piece Blox Drawer Organizer Set.