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How do i find shirts like this? | |  | |  | |
Most likely you'd keep sampling shirts. But it will probably be a challenge to find t-shirts that fit a sort of arbitrary criteria that isn't even your own (your friends idea of "quality" could differ from your own or from your customers and there's a lot of factors that go into how a shirt feels on a person and how it washes)
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What should i be looking for in the design? | |  | |  | |
There are some t-shirts that have tighter necklines, like Luxe-T, ProClub, CityLab, American Apparel. At the same time, it's hard to say if those would fit your needs.
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or is it just some ppl pay closer attention to the washing instruction? | |  | |  | |
This is true, and it's also that some people pay closer attention to their t-shirts in general than others.
Like me, for instance. I could give you a laundry list of pet peeves I have for t-shirts

I've worn and tested so many t-shirts, that there are likes and dislikes from all of them.
That doesn't mean the ones that don't have qualities I personally like are bad quality. It doesn't mean that I wouldn't use or sell t-shirts that don't fit my own standards, because I fully realize that I'm an odd duck and I probably notice more stuff about the t-shirts I wear than most end consumers ever would. Also, I'm not always my own target customer, so while it might not be the right shirt for me to wear on a daily basis, it may be the
perfect t-shirt for a particular market or niche.
The more you know who you're going to be selling to and what kind of t-shirts they like, the easier it will be to pick out a good blank t-shirt for your line. Couple that with your own preferences about how you want your line to "feel" and "fit", and you should have no trouble picking out a good blank.
Buying samples is key though
