Short-sleeved undershirts: 3 Combination undershirts: 4 Total: 7-piece set. I think it's okay for both boys and girls. I didn't have many opportunities to wear the short-sleeved undershirts because it was hot, and I only used them about once or twice. I wore the combination undershirts until I was 3 months old, but I don't think there are any stains or dirt. There may be a feeling of use. (I apologize if I missed anything.) They are still clean and wearable, so I hope you will make good use of them‼︎ * One has ties inside and two buttons on the outside, with two stages. * Another one is the type that ties both inside and outside. Please refrain from purchasing if you are nervous about used items.