Great shoe! Followed the sizing suggestions
928560
Great shoe!  Followed the sizing suggestions, but they were a little too big.  Not really an issue though so I gave it 5 stars.
1511067
I wanted to write this review because the comments here really helped me decide which size to buy.  I normally wear a size 8 show (in dress shoes, heels, converse, etc) and I typically buy a size 9 in athletic/running shoes as recommended by several running stores (due to the swelling of feet when running).  Reading the reviews said these run small, so I bought a size 9.5 - and they fit me PERFECTLY as an athletic shoe! No squeezing in the toes and feel very comfortable and well cushioned. I would definitely size up 1-1.5 sizes from your "normal" shoe size for a comfortable running shoe.  I do have high arches and the arch support isn't QUITE as good as my Asics (which really are made for those with high arches), but should still be fine... I would describe these as having neutral arch support.  Love the pink color too - so bright and zippy :) And a GREAT price on Prime Day. Hope this helps someone!
757619
I followed the recommendation of another reviewer who stated I should go 1 size up.  I did, and they fit.
4971959
I took the advice of several other reviewers, and ordered 1/2 size up (I usually wear 8 1/2, ordered size 9). Perfect fit! My arches are collapsed, and I do not wear inserts. I need good padding, and these feel SO good!! My previous shoes are Brooks GTS 16, and I am VERY glad I ordered the 17s!! I have finally found a shoe that I love!!
72355
I followed the other reviewers' advice and ordered a half-size larger than my street shoe size, and that was perfect. I've already danced in them for a couple of hours, and they were great - no blisters or sore spots. Love the look!
2840591
love the shoe but listened to another review who suggested to size down 1 size ,that was too much 1/2 would be on target ! Beautiful shoe and sooo comfortable, due to the price I got, I kept mine! .
2608669
Great so far! I picked up a pair in the large size, which was okay although a bit loose. Even after washing, the sock would be more relaxed, for example, with the toe cap not really being pulled firmly around the toes, if that makes sense. In order to get a snug fit around the forefoot I had to pull the heel back a ways. This meant, one, that the seam for the actual heel cup was past my actual heel. Two, it meant that when the sock was pulled up to basically make the whole sock a snug fit, the whole "low/no-show" style was basically moot. I wear a men's 11-11.5  shoe and found a medium to give me a better fit all around and to fulfill the low/no-show design for running shoes and low cut hikers. The large size for me might actually be a better fit for wearing a mid-height hiking shoe as the higher ankle would offer some cushion against the collar of the shoe.
910237
I ordered the same 10D size I have been wearing for years.  They are very "snug."  Several days after receiving the shoes, I stumbled on to the recommended sizing app on the order page.  It recommended one half size larger and one size wider - probably exactly what I needed.  aThere were and still are not any 10 1/2 2E size available in this shoe. I like the shoe and it's feel. I'll order them again if available and when this pair wears out.
656560
I really like these shoes. I've owned a pair for a few months and I wear them daily. I have not experienced any of the deterioration that some other reviewers have noted.

I bought my first pair of these shoes about a week before I was going on a vacation that involved a great deal of walking. They provided me w/ a great level of comfortable support during this vacation, even on days that involved walking for 8+ hours. I would highly recommend these shoes to anyone needing a pair of walkers.  HOWEVER, I will agree 100% w/ reviewers that complain about the fit.  I wear a men's 9.5US in almost every brand of shoe.  I am a wearing a 8.5US in these Merrells.  Additionally, they are a bit more narrow than most shoe brands.  The feeling of wearing a shoe that was slightly too narrow for me went away after a couple days of wear.  These are a canvas shoe and I'm not sure to what degree canvas stretches, but mine seemed to have stretched.  With that in mind, my suggestion to prospective buyers is to go to a brick and mortar shop and try on a pair of Merrells to find the appropriate size for your feet, if you are able.  I found a JCPenney that had this shoe in a color I didn't want, but I was able to figure out my size, come back to Amazon, and order the color I wanted.
1486274
So glad I bought this shoe!!! I was hesitant at first - buying a shoe before trying it on for size or seeing the style in person. I'm happy I took the risk. The shoes are amazing. Light and super comfortable. I put them on at home and didn't take them off for the first 3 hours, they feel like they're part of me now. At first I thought the back strap would rub my ankle and bother me, but I forgot about it within minutes of putting it on, maybe it needed to mold to my foot. I agree that these run a little small. I'm between an 8 and 8.5. I ordered the 8.5 and they fit just right, maybe a little snug. I'd recommend going a size up. These shoes would most comfortably fit a narrow foot. I ordered the wolf grey and absolutely love the color! The first time I wore this shoes, two people approached me and said they had the same ones in several colors and LOVED them. This really is a great shoe.
956161
Complaints about this shoe were "small toe box" and "slips at heel."  Initially, I ordered size 13 because it was indicated as the best size for me.  The size 13 shoe was too small and slipped at the heel.  I reordered size 14, and I am in love with these shoes!  They are very comfortable, fit perfectly, and do not slip at the heel, even though there is a wee bit extra room.  In short, they run small. Order one size up and, hopefully, like my 14s, they will fit perfectly!  As an additional note, when I wore them for the first time in my league play, four other guys had the exact same shoe, and all of them like theirs as much as I do mine.
2679339
I ordered these a little smaller than my normal shoe size as other reviewers suggested, however the shoe was still too large. I ended up going down 1.5 sizes (from a 9 to a 7.5) and it worked great. The shoes have really nice grip and are flexible but strong in the right areas. Great look and feel.
795328
I normally wear a size 10W shoe, but ordered these a size up... so glad I did!  They also run narrow, so I ordered a pair of shoe stretchers to get that thick band around the instep to relax a little.  Now I do have just really wide, round feet, so...  but lengthwise I initially went a half size up (41W EU / 10.5-11W US) and they were just too short.  My heel rubbed on the back.  Also, they're made so the heel rises and falls in them much like any stiff clog type of shoe.

I'm a middle school teacher, so on my feet all day.  These shoes are great for my back and very supportive for these paddles I have for feet.  LOL  Terrific shoe, I just highly recommend you order at least one whole size up if you don't normally order European sizes.
4973016
Fit was great. Used their true fit calculator (On running website) to figure size. I wear a size 8 in Brooks Pure Connect, got a 7.5 in the On's. Love the elastic laces since I usually replacing laces with elastic anyway. I did tighten up the laces quite a bit and ended up looping the extra lace through the other eyelets at bottom and top of lace/tongue area to get it out of the way. First run in these shoes was 6 miles, paused at mile 1 to tighten right shoe lace a bit as heel was rubbing a little, but rest of the run was uneventful. No blisters and worked great. I think I'm going to like these, hope to get 3-500 miles out of them. We'll see.
1120615
Awesome shoe!  Simply should've ordered a half size lower than my true size and they would've been perfect.  I didn't get to try them out in the water since I sent them back so not sure if Sams would've gotten trapped inside bit they didn't look like the sand would filter through easily and they are skin tight shoes so might need to empty them frequently I'm assuming.  They multi task as being a comfortable walking shoe as well,  I wore them around the house.
4113794
Great! Just be sure to look at the sizing guide. We ordered size 9 for my daughter's 8.5 feet and they are perfect!
4547616
I really like this shoe!  It's my third pair by Keen, and my first-ever hiking shoe.  As far as size, I've ALWAYS worn an 8.5, in any type of shoe, and I have somewhat narrow feet.  Based on the reviews I was really conflicted about whether to order these in my usual size 8.5, or to go up to a 9.  I ended up calling a shoe store here in Chicago because I wanted to actually try them on, and they had the color I wanted (Gargoyle/Ceramic) in a size 9 (no 8.5 for comparison though).  I'm so glad I did!  Going up a half size to a 9 was perfect!  And I've never bought a size 9 anything, ever.  Note that my first pair of sleekly-styled Keen boots (worn with thicker socks for Chicago winters) were a perfect 8.5.  Also, another pair of Keens I tried on in the store today (KEEN Women's Presidio Casual Shoe also on Amazon), with the same thicker socks, was also an 8.5 that fit perfectly.  But with these particular shoes, going up a bit was perfect.  I wore them all day.  Very comfortable.  They are slightly clunky but, hey, they're hiking boots so I think that's to be somewhat expected.  And they are WARM.  I noticed that my feet were very toasty.  I hope this helps.