Please refer to your chosen bike’s sizing chart to select a bike that works best for you.Inseam is the most important metric to consider when deciding on bike size. In order to take this measurement properly, follow these guidelines:Stand upright with your feet 6-8" apart.Using a tape measure or tailor tape, measure from the bottom of your foot to the top of the inside of your leg.Compare your inseam measurement to the standover height of the bike. You should have about an inch of space between your body and the top tube.If you’re interested in a step-thru frame style, please note that standover height is not as important as your comfort while riding your bike. We provide a handful of frame sizes with an adjustable seat to accommodate different body types and heights. If you have any questions regarding sizing and frame styles, please reach out to us at team@retrospec.com or give us a call at (888)-488-2369 so we can help out!