This base set includes

-75 Different Designs

-one 20mm square, seven 25mm round, seven 25mm square, four 25mm x 50mm rectangle, six 32mm round, four 35mm round, four 30mm x 60mm rectangle, seven 40mm round, seven 40mm square, four 50mm round, four 50mm square, four 50mm x 75mm rectangle, two 60mm round, four 60mm oval, four 75mm oval, two 90mm oval, one 100mm round, one 100mm square, one 100mm x 150mm rectangle

-5 different versions of each base

-Base Toppers-Flat versions-Flat versions with supports-Magnet holes for 5mm x 1mm magnets-Magnet holes with supports