Weve been on the hunt for the perfect jean. Our son is 5 years old, 43 and 70 lbs, with a long torso. We ordered a size 8 huskey and hes currently wearing a size 7-8 in h&m jeans. Its very hard to find jeans for him, because he still has a bit of a toddler build to him, but hes tall.  We ordered these, because we expect him to outgrow his current jeans by Septemeber(ish), so they were supposed to be a little big in the waist and length and they are perfect! They also have stretch to them, which he loves! These definitely run true to size, in my opinion and weve had many brands of jeans through our house. Looking forward to purchasing more and I highly recommend!