Coordinates with XL-4, XL-5, XL-6.

Plates sizes:
5-1/4" X 5-1/4"
4-5/8" X 4-5/8"
3-7/8" X 3-7/8"
3-1/8" X 3-1/8"
2-3/8" X 2-3/8"
1-3/4" X 1-3/4"
This is from the L series, you will need the dies from the XL series to layer them like nesties.