From the release:
Today Micro Art Studio have released a bunch of new bases:
Winter Shale 120mm wround base
Cobblestone Bases, 20x20mm
Cobblestone Bases, 40x40mm
Cobblestone Bases, Cavalry 25x50mm
Cobblestone Bases, 50x50mm
Graveyard Bases, Wround 30mm
Graveyard Bases, Wround 40mm
Graveyard Bases, Wround 50mm
All bases available in on-line store