Hey Pat, you say you are 'currently' 194cm tall - are you expecting to grow some more..?? I'd say the 150/152 might be a bit squeezy for someone your size. Maybe the 172 or even a PA28 would be a more comfortable option although you'll pay a bit more. As tail wheel says, go try them out and see for yourself. You'll work it out pretty quickly. Best of luck..!