Had to design my own 3 x 7 = 63 slots total for all Catan hex tiles that are various heights (70 mm - 200 mm height). The sides are 45mm exact to the hexes fit perfectly (you can turn it over and they wont fall) but you can print 2% scaled up for some extra room.

24.5 x 23.5 cm at 100% - this is clost to max print area of X1C.