32mm lipped round base adapter that fits 25mm bases

thingiverse

This is a 32mm base adapter for wargames miniatures on 25mm round bases. It converts the 25mm base to a 32mm round lipped base. Just pop the 25mm base inside and you are good to go. It will fit quite snugly and will usually not need any glue or even move about. Print them in black material and you won't even have to paint them. Shown with a Citadel 25mm base for Warhammer that just pops in (and out if you want), and with a Reaper Bones Nagendra that has a 25mm integral base which resisted at first but clicked into place with a little push. No glue needed.