Giraffe crank length?

What length cranks are you using on your giraffe?
I have 171mm 3 piece cranks on my GB4 Mini giraffe, with a 2.25/1 gearing.

I think that I have the same size cranks as you, but I have a 1/1 gearing. I want to ride mine, but I have a flat :frowning: !