It is important that t-shirts are manufactured to a high standard. To succeed in the industry you have to consider the following when choosing t-shirts for printing:
Material - This is the main fabric that creates t-shirts and will determine whether you can wash and dry them without them shrinking. Cotton t-shirts are well known for their durability and versatility.
Stitching - Bad stitching will lead to t-shirts with loose stitches that can wear holes in them or break after a few washes. Get t-shirts with taped seams to avoid this problem.
Labeling - Unlike most other clothing items, t-shirts don't usually have labels actually stitched into the side seam. If the t-shirt has a label printed onto the fabric, make sure it's securely sewn onto the shirt - otherwise, it could peel off after a few washes.
Color - T-shirts come in different colors that vary in their ability to hide stains and last through the laundry. White shirts get dirty easily, while other t-shirt colors like black and navy blue stay looking good longer.
Fit - Your t-shirts should be comfortable and not too tight or too baggy; find the right fit for your target customers.