I think you are right bxcc, I've changed to 17".
What do you think about the bottom bracket size ? I need an eccentric BB and was about to go with pf30 .

Thanks for the replies.
i've done a frame with paperboard 

Hi, every one I'm Roy from France.
I'm about to order a workswell wcb-m-078 and I could use some advice .
I am 1.80 meter or 5.9' high , what frame size shoud I choose ?
Also do you think the pf30 BB is a good choice ?
Thank you.