Hey All, new to the forum and excited to get into road cycling. I am a mountain biker so I have no experience with road bikes. I am looking to buy a giant defy, and the shop has both a M, and a M/L.

Giants sizing chart says I'm a M. My credentials are: 5'9.25" and 32-33.125" inseam depending on if I have shoes on or not. Medium felt good riding, but I couldn't help but think it looked and seemed small. The LBS said he has a M/L to try but needed to assemble it. Question is, what size to get? The size chart starts at 5'11 for the M/L but I do fall within the inseam measurements.

Any help appreciated!