I wear an 8 1/2 M and these shoes come in whole sizes.  So I got the 9 in the Marinho. I put them on after I got home from work, which I had heels on all day, so feet were a little puffy and they were tight,not terrible but tight.  This morning I tried them on and they fit much better. The fit around the heel is good, however, the toe box is a little narrow and my big toe is right at the tip.  This could be because you are walking on your toes with a 4" heel and no platform to get some of the pressure off your toes so your toes naturally spread.  Expect toe cleavage, there is not a lot of shoe in the toe box area.  Being a 4" heel and no platform the wedge makes these easier to walk in feels more stable then just a heel.  I went to Amazon and I see that they come only in whole sizes and the next size up would be a 10. I'm going to keep these, because they will be good for a short work day and not expect to do a lot of walking.  However, I like the brown ones and those I will buy in the size 10.  With that being said, these shoes are really nice.  The suade is soft a nice black and the heel is awesome.  The colours are not as bright as in the picture.  In the picture you see the black, purple and green or teal.  It's harder to see the difference between the black and purple, but the green makes them pop.  These will look great with a pair of ankle pants, or skirt.  You want to wear something that you can show the heel. Delivery was fast.  Ordered them on Sunday, they arrived on Wednesday.  I would recommend these shoes, just keep in mind the sizing.