Yes, absolutely. They are a form of art and therefore copyrightable.
Yes, as long as you made the original design. If you did not, you will likely be sued for copyright infringement. If you purchase a T-shirt, the copyright owner of the design has no further right to regulate anything you do with it, as long as you do not make your own copies. On the other hand, some designs may also be protected as trademarks and that would be a different question.
If you control the copyright, anywhere. If you don't control the copyright, and don't have a license, nowhere.
If the design meets the minimum requirements for copyright protection, yes.
An aloha shirt is a form of collared shirt originating in Hawaii, with floral or Polynesian, often brilliantly-coloured designs.
Customink.com is a great place to look for custom shirt designs. They have all sorts of images that you can use, or you can upload you own. They also have free shipping.
Look for a copyright tag.
T-Shirt designs or any other designs you will need for patterns on clothing.
Shirt buttons are round because it makes it easier to get through the loop or the hole on the shirt, instead of having some other designs.
Song lyrics are copyrighted. Unless one gets legal permission, license agreement, then it is copyright infringement. You cannot sell those tees until you get permission from the copyright owner.
There are a few ways to interpret this question. Can you put someone else's copyright-protected words on a t-shirt? Only with their permission. Are the words on a t-shirt protected by copyright? Not necessarily; usually what's on a t-shirt is too short to qualify for protection by itself. It may be registered as a trademark, if it's a slogan or company name, or the words may be included in an otherwise copyrightable image, but exclusive of design, simple words would probably not qualify for protection.
No. But, in all likelihood it would be a violation of trademark
It would be a trademark violation, which is similar.