I got these to replace a worn out pair for my husband's work clothes, which are also mostly Carhartt stuff. I looked at a couple cheaper pairs, but they had mixed reviews.  Sometimes, it's just better to spend a little more and get better quality, and so far, this has been holding true.  He's a big & tall type, and he still had room to adjust, which was one of my concerns when I ordered.  The tag attached said " 46" ", so hopefully that and this review helps someone out there with figuring out the size of these suspenders.  On day 2, he remarked how awesome the clips were at holding onto his pants, which he seemed extremely happy about.  No slipping is a good thing when you're on your feet and moving I suppose ;
I do not know the long term outcome of said suspenders, but so far, this is working great for hubby.

*Update: September 27th, 2011*  Hubby is still using these suspenders all the time at work, and they are holding up very well.  So far, no repairs needed, no griped about the clips holding on tightly, etc.

*Update: March 3rd, 2012*  After a year, the clips are still holding well.  The only complaints as of recent are that the adjusters on the straps are beginning to slip a bit, and have to be readjusted during the day. For 12 hour days in yucky environments, these suspenders are amazing, and we'll be buying another pair when these finally give out.