Should I go up a size?

[JD Hammo]

Just got my first pair of Black KSOs today in the mail (Size 39) and they fit wonderfully! Or at least for a while they did.  My big toe just barely rubs the front end of it's pocket but all of my other toes have more than plenty of room, my pinky feels like it takes up a little more than half of its pocket, my smaller toes actually feel like they're just barely big enough to be comfortable in the shoes (but this is most likely me just being silly)

My problem is I think my left foot may be wider than my right now, because the rubber (the high part behind the big toe that comes up to the Vibram logo on the top of the shoe) began to rub my foot raw.  This doesn't bother me with my socks but after about two hours in them without socks, it began to feel pretty raw. 

Mind you that is the only problem with anything at all from what I can tell.  So should I size up?  I'm just worried that if I did my other toes wouldn't fill the pockets very well.  Or will the shoe just wear off right there eventually?  Just an added bit of information if anyone needs to know, measuring my foot the proper way it's exactly 10''

Preemptive thank you to anyone who happened to even poke in and read

[The Yeti]

If your toes don't quite fill up the pockets, you won't want to size up, as youll have more rubbing issues in other areas of the foot.

I had the same problem when I had the kso's. I got pretty bad blisters on both feet from the seam that runs along that piece of rubber right behind the big toes. I think it's pretty common with KSO owners. I used injinjis in them until my big toe seam blew out, then I traded them in.

You could try one of the mods mentioned on the forum, like taping the seam down so it doesn't rub.

Good luck!

[acc]

If you don't need the ability to return, try hand washing them. From experience, the seams get softer (or less ragged at least) when a bit of detergent is applied. You could also try the lighter thing (Morton's toe mod) to lengthen a size 38 in the big toe instead. (http://birthdayshoes.com/got-morton-s-toe-lengthen-your-vibram-five-fingers-second-toe-with-this-mod)

If your big toe is barely touching the end, I'd try Injinji socks instead.

[JD Hammo]

Thanks for the advice guys, I'll wear them another day or two and see what I think.  Wore them for a good four hours today at an outdoor party with plenty of running and my I think they might be softening up. But I'll keep an eye on them.

[Mr. Leigh]

My big toe just kisses the end of the toe pocket and the rest of my toes, or at least the last two for sure, have plenty of room to spare.  I personally have not had any seem rubbing issues in mine, however others that have had issue have stated the bodyglide on the rubbing area can minimize the irritation until the shoe breaks in a little more.  If you do not want to use that, then I second acc's suggestion to try a pair of toe socks.