All of our bikes are unisex and are designed to accommodate a wide range of heights! Most people between 5'2" and 6'2" can ride our bikes comfortably. People just outside that height range can ride our bikes without issue as well, but you may want to take a look at the frame geometry infographics we have on each model's technical specs pages to get a better idea if they will work for you. You can find links for each model below:
Generally, people who may have slightly shorter legs tend to be the most comfortable on the RadMini or the RadWagon as these models have roughly 27" standover heights (the standover height is the distance from the top tube on the frame to the ground). Taller people tend to be the most comfortable on the 20" RadCity as it is designed for people between 5'11" and 6'7"!
We have developed a handy survey that will give you a good idea as to which of our four models will be the best fit for you. Check it out HERE!