This is a remix of the amazing remix, https://www.thingiverse.com/thing:2738211 by DrLex.
Only change i made was cropping a hole for attaching the t-rex to a keychain via it's tail.
For keychains i'd suggest a downscale to ~ 60% size (X, Y and Z equally) - but also works quite nice when scaling up to a comically big size (225% in picture)...
flexi_trexi_keychain.stl | 352.5KB |