Trade: 65cm Lugged Carlton Frame & Forks For 53cm (approx) Equivalent Lugged Frame & Forks

if you're 5'10 you'll probably need bigger, 56 or even 58 ctt, measure your inside leg by shoving a book between your legs as hard as saddle would press, mark that off against the wall (no shoes) and measure to the floor, I think you multiply that by 0.88(someone will correct if this si wrong) to get a guide to frame size (ie seat tube size centre BB to top).

A better method is to multiply your inside leg measurement by 1.09. This will give you a good starting point for saddle to pedal distance. Subtract length of cranks and saddle/seatpost combined. and voila.

measuring your inside leg by what? inch? centimeter?

Whatever units you want the final result to be in. I'm going to have my next frame measured in miles.