Hey, as i didn't find an appropriate keychain, i simply use the tool Image to Keychain and created this model.
Dimensions:
Big ~ 100 mm x 154 mm x 2 mm
Small ~ 50 mm x 77 mm x 1.50 mm
The hole for attachments is included on the top.
It is printable on a A1 Mini or larger (P1, A1, X1 etc.)
Disclaimer: The Logo belongs to the owner of that brand / Kulturkosmos - as I do not intend to sell the items, that should be fine.Please do so aswell. Source for the Image used: facebook.com