New Lego Parts. Base Plates. Stud sizes 16x16, 8x16, 8x8, 6x12, 6x10, 4x10 etc.
Plates in stud sizes of: 16x16, 8x16, 8x8, 6x16, 6x12, 6x10, 6x6, 4x12, 4x10, 4x8, 4x6, 2x16 etc. 8x16 stud plates are 6.4 cm x 12.8 cm. 6x10 stud plates are 4.8 cm x 8 cm. 16x16 stud plates are 12.8 cm x 12.8 cm.