On the net I was looking for a crowbar for removing ticks from a dog. In the search selection, I saw a simple keychain. https://www.amazon.com/Tick-Key-Remover-Assorted/dp/B000R1D3KQ?th=1
Looked at the dimensions on the wiki:
The size of an adult tick ranges from 2.5 to 5.0 mm in a hungry state. A well-fed tick can reach 7-10 mm, some species are larger - 11 mm.
I made my own version.
tickey.stl