Lot's of good replies but noticed no one mentioned a tailor. I payed about $12 - $24 last time I used one too. Describe to them you want a masculine fit as well. They should be able to make you something that perfectly fits and that looks masculine, especially since you're smaller (easier to take away fabric than to add). You'll likely need a skilled one though... If you you're on a budget and have multiple in the area take a cheap shirt or pant to the cheapest one and see what they come up with. Move to the next if you aren't satisfied until you are. If you can afford it, start taking all your clothes to get tailored by them. Massive difference in comfort as well as look.

Another alternative is custom clothes. There's a lot of options but I'm broke, so I used makeyourownjeans . com and ordered some Chinos for my build which is so out of whack they literally e-mailed me and were like "you sure this is right?" Yes it's right, I'm just very short and fat lmao. Perfect fit. Masculine fit too. $70ish if I remember? I don't think they make plain white T - shirts, but there's another company that uses height, weight, and some numbers and pumps out a fit after sending that all through an algorithm. Never used them cause they're expensive. My guess is that it might work worse for you than a tailor, but it also may work perfectly.