I've seen those A4 sized presses and they seem OK. One thing you can do is try one of them and see for yourself. You can have a shirt printed on one of those presses and see how the edges holds out versus those pressed with 15x15 presses.
I lack the perspective of having used other than a 16x16 heat press but if you plan to print only A4 size papers I don't see why a Hix, Stahl and Geo Knight A4 heat press won't be enough. We have been selling just A4 sized heat transfer shirts since last year. However, if you plan to print larger images then a 15x15 press gives you a little more flexibility. But if you plan to print A3 size prints then obviously, even a 15x15 won't be enough. You need a 16x20" press.
What are the prices of the 5 presses you listed?
But personally, since you said "I've been tasked with making 70 shirts (7 designs) and thought it would be cheaper to buy the material/press and make them instead of paying a vendor." I'd go for an A4 press which should pay for itself instantly then decide later to buy a 16x20 press or not. The A4 printer will always come in handy at a lower electric bill outliving the 70 shirts.
I lack the perspective of having used other than a 16x16 heat press but if you plan to print only A4 size papers I don't see why a Hix, Stahl and Geo Knight A4 heat press won't be enough. We have been selling just A4 sized heat transfer shirts since last year. However, if you plan to print larger images then a 15x15 press gives you a little more flexibility. But if you plan to print A3 size prints then obviously, even a 15x15 won't be enough. You need a 16x20" press.
What are the prices of the 5 presses you listed?
But personally, since you said "I've been tasked with making 70 shirts (7 designs) and thought it would be cheaper to buy the material/press and make them instead of paying a vendor." I'd go for an A4 press which should pay for itself instantly then decide later to buy a 16x20 press or not. The A4 printer will always come in handy at a lower electric bill outliving the 70 shirts.
