I have been looking for a belt for my two year-old, and having no success.  I found these on Amazon and am very pleased with them.  At first I thought they were a little pricey, but since I can't find a small enough belt, and they work so well, I have decided they are definitely worth the money.  They work for my three younger kids, ages 6, 2 and 1.  My kids tend to be skinny with no rear end, and I use onesies to hold their diapers on!  Dapper Snappers have solved that issue for me, holding up their pants very well.  There is only one pair of pants with oddly spaced belt loops that they have not worked on so far.