These Butterfly Lycra Opaque tights, girls uniform tights are durable and neat on the legs. We"ve got a great selection of these school tights in a variety of colors; imported girls tights is our specialty. These Butterfly tights are one of our great sellers. We do have tips that really help but are not guaranteed for good.Tip #1 Always wash tights inside out, it keeps the tights from getting catches.Tip #2 Hang tights to line dry, the dryer might ruin the tights.Tip #3 Make sure your child"s toe nails are cut, so the sharp edges don"t tear the tights. (one of the main reasons why children have holes by the toes)Size Height Weight2-4 - 33"-38" 28-38- lbs.4-6 - 38"-45" 38-50 lbs.6-8 - 45"-51" 50-62 lbs.8-10 - 51"-56" 62-74 lbs.10-12 - 56"-60" 74-90 lbs.12-14 - 60"-64" 90-100 lbs.A - 64"-66" 100-110 lbs.B - 66"-68" 110-125 lbs.C - 68"-70" 125-140 lbs.