Both pairs of my Merrell sandals broke 2 weeks before we head on vacation. I pretty much have lived in Merrell sandals (they used to be better) for the last 20 years. I saw these, thought they were super cute and trust the brand, so I decided to try them. When I first purchased, I went with 9W based on reviews and measurements. It was far too short for me and I doubted it would be wide enough even if I sized up. I ordered 2 more in hopes of finding something before vacation. The 10W wasn't wide enough. My foot still hangs a tad over in the 10WW. I didn't expect that. I'm keeping the 10WW because I like the design, the foot bed is comfortable and I'm in a pinch. However, there does seem to be something wrong with the left sandal. The strap between the toes "pulls" to the left - so it pinches a bit. I've been wearing them in hopes it stretches some. I'm hard on my sandals and these are prettier than I normally get. I doubt they'll hold up for years... but, I'm still going to wear them into the lake, hiking, etc. In the photos, it goes 9W, 10W, 10WW, left to right.