boys‘ underwear pure cotton class a cotton boys‘ baby boys‘ middle and big children‘s development period cotton underwear autumn and winter boxers

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size m weight 10.00 kg-14.50 kg(M码体重20-29斤) size l weight 15.00 kg-19.50 kg(L码体重30-39斤) size xl weight 20.00 kg-24.50 kg(XL码体重40-49斤) size xxl weight 25.00 kg-29.50 kg(XXL码体重50-59斤) 3 size xl weight 30.00 kg-34.50 kg(3XL码体重60-69斤) 4 size xl weight 35.00 kg-39.50 kg(4XL码体重70-79斤) 5 size xl weight 40.00 kg-55.00 kg(5XL码体重80-110斤)