My 12 year old son wears a size 12 (slim) jeans/trousers but recently I bought him some trousers in a size 12 (regular) and also , so he needed a strap to hold them. I ordered this medium sized Dockers Boys belt for him and it fits him well. It closes the belt with several holes (about 4), so the average size will easily fit a child who also wears (regular) size 12 pants. For a child wearing a size 10 and under I would advise going for a small one as a size 12 (slim) child will use a medium sized belt which is as short as possible. The belt is smooth and consistent so there were no issues. with unbuttons or unbuttons.
Stylish Steve Madden Kids' Reversible Belt for Boys
41 Review
π Adjustable Stretch Belt for Boys - Essential Boys' Accessories for Kids
30 Review
ποΈ ARMYU Army Web Belt: High-Quality 100% Cotton Canvas Military Style Belts, Extra Long at 54 inches
34 Review
3-Pack Adjustable Magnetic Belts for Kids π¦ - Convenient Magnetic Buckle Belts for Boys and Girls
41 Review
ORVINNER Kids Winter Gloves - 3 Pairs Children Warm Wool Lined Gloves for Boys and Girls, Toddler Thermal Knitted Mittens
45 Review
𧣠Warm Winter Chenille Cashmere Stretchy Boys' Accessories by Motarto
39 Review
π¦ Colorful Dinosaur Boys' Accessories: Waterproof Mittens for Outdoor Adventures and Cold Weather
47 Review
𧀠Ultimate Protection for Toddlers: Waterproof Winter Mittens with Fleece Lining - Ideal Cold Weather Accessories for Boys
52 Review