9 slots, 12x12 or 16x169 slots, 12x12 or 16x169 slots, 12x12 or 16x169 slots, 12x12 or 16x166 horizontal slots, 12x12 or 16x166 horizontal slots, 12x12 or 16x164 squares, 12x12 or 16x164 sqaures, 12x12 or 16x1616x16 size only. 16 slots