You have seen so charming T-shirt. There are various types of T- shirt in various places. You can buy them from your home through online. So I think you have to know their name. You saw this may be called Long sleeves, Deal Jeans, Ladies Slob Blouson Top, Ladies Short Sleeves Slim Fit Cotton Front Print T-shirt. You can buy them to use these names.
I don't think they have a name. Have you tried putting your question into Google???
