I wear a size 7 shoe and have for years. There are times when shoes run small or narrow that I will get a 71/2, however this is rare. I decided to purchase a 39 shoe because of the reviews (running small) and the sizing charts, it fits fine. I probably could have gotten the 38 and it would have fit but I do think it would have been snug. My other spin shoes are a size 38 (Venzo brand). The reason I changed brands is because I needed shoes with a Look Delta clip capability. I am using these shoes for spin class and they work fine. These shoes are shinny, but I really do not care.... again spin class. I hope this helps with sizing difficulties with this shoe. :)I started taking indoor cycling classes a few months ago and decided it was time I got my own shoes, rather than just using the studio ones.I took these shoes for a spin this morning and they worked great! I wear a women’s 9 - 9.5 and ordered a 42, and they fit perfectly. Some reviewers were concerned about the tongue being too stiff and cutting into the ankle, however they have a slit cut into it which prevented any discomfort for me.These shoes are a gorgeous matte white, with purple holographic accents on the logos. Installation of the delta cleats (purchases separately) where easy and clipped in the first time with no fuss.I love these shoes, they’re so cute!Great Shoes! Since I was unclear of my size I had to order them twice. LOL! Which was fine because the return was so easy and quick as well as getting the larger size to me. So- I am a size 10 or 101/2 the 43 fits my foot well. And they really look great and high tech. When you have a 10 1/2 size foot its nice to find a shoe that doesn't make you feel like Bozo the clown and even make your feet look smaller. LOL! Anyway I am just coming back from a right fractured ankle and a left fractured foot. I really think that because of the support and fit of these shoes, my feet no longer hurt after class (they really hurt horribly when I was just wearing my sneakers) and I seem to have more control and I can spin faster. Having them makes my work out in spin class so much better.So far so great! I needed to order spin shoes because I began coaching at a spin studio and was finally ready to invest. I had no idea where to start, so I started researching different companies, etc. I feel like I read a gazillion reviews that only really made me more confused. I finally landed on these due to a) the looks (I wanted white) and b) the reviews were pretty good. I've used these twice now after installing SPD attachments to the bottom. Installing was super easy with this shoe, and the rides have been awesome. This shoe is great- totally comfortable, sturdy, etc.! They do run EXTREMELY small. I don't remember what size I ordered but after looking at the chart, I normally wear an 8-ish in workout shoes and I ordered the equivalent of an 11. I would definitely recommend this shoe.To be in this review I'm going to neglect whether I like or dislike this product. First, let's go over the sizing chart. To convert your size to the correct size in this shoe is almost impossible. I wear a women's 9 1/2 to 10. I ordered what the sizing chart told me to order and ended up with a women's 8 1/2. Then I read deeper and deeper into the reviews and realized that I probably need more of a 42 or 43. I have now ordered the 43 and it is just a bit too big. So now because of the sizing chart deficiencies I am returning two different wrong size products to get finally, the right size. I'm not sure if I will order a third shoe with this company. Next is the appearance of the advertisement. The shiny finish is not bad in person however it was not advertised to be that way. The color is advertised as a matte finish, which this is absolutely not. I'm sure the shoe will work great once you can go through the process enough times to get the right size. I tell you though, the process to get this shoe in the correct size with the correct expectation was too lengthy.These shoes run small which was exactly what I was looking for since I’m usually a size 4.5 / 34.5 womens. I think cycling shoes generally run small anyway because I used to rent from my spin studio and it was also a 36 that fit me well as well. I bought a 36 which fit me perfectly so definitely buy a size larger. Have been using them in my spin class for the last week and it’s been great!Bought these for spin class. Have worn 4-5 times and they are a little stiff and a bit uncomfortable on the top of my foot if I wear thin socks. Felt better with thicker socks. I am a size 8 in running sneakers and bought a 40. I have worn other brands in a size 40 and these tend to be a bit smaller, but still fit well.These do not come with the clips just as a heads up that you'll have to spend another 20$ on those. Anyway, I love these shoes they fit my foot just perfectly snug. Normally I wear a 7.5, I ordered a 7.5 and they are snug but not tight. The foot flap has complaints of being stiff. It is stiff but definitely doesn't cut into your ankles or anything like other people said. I love these shoes because they are probably the cheapest you'll be able to find.It fits ok, but is a bit small!It is a nice product Anyway.,