I ordered a 9M and my daughter wears a 9-9 1/2 in toddler shoes. I was very skeptical at first and wasnt sure that it can hold large items securely on the roof rack. Light and breathable. Sinon appairage très facile. Need to get a new pair every year or so. During this covid time, I have been working from home and need to charge my phone all the time. Only problem is the rubber/plastic parts would self-disintegrate after a while. This is really decent rack and the A- shaped do give nice look thou. The extenders are nice if needed. but I took a chance.