send them 2 of the same, i think
Yes, mail it to them.
It only seems to work for me if it's something of their style and were really good friends. Sometimes they just display it in their house.
I know about the tank tops, anyway, I'm gonna talk to Punchy a lot, and then send him a letter with the orginal cherry top he wore in the 1st AC, so he can look like thati'm pretty sure you just have to send them two copies of the same shirt. they'll display one in their house, and then they'll wear the second one. that's what i do with chrissy and tia when they keep on changing outfits. thank god marshal hasn't changed outfits b/c i don't have his original denim shirt catalogued. ;n;
edit: fun fact! most villagers wear their shirts as tank tops, but you can send them any version of the top (long sleeve, short sleeve, etc etc etc) and it won't matter to them.