[Tshirts, which specs and files?]

tks More info pls fiverrs!

[Tshirts, which specs and files?]

Hi all,

I have started requesting projects for tshirt designs but right now more focused on the images I need so I have not necesarilly been working with tshirt designers only.

Im not a designer and I only have access to GIMP (which I have but Im not familar with or Canva).

1. I am not sure which specs to provide since I will sell across Amazon Merch, RedBubble, Etsy etc. Here are the Amazon specs for t-shirts. If I ask for this, will it work for Etsy or Red Bubble?

300 ppi/dpi
sRGB
Transparent PNG
File size does not exceed 25MB
4500px by 5400px

2. I dont know which type of file to ask for so that I can add or change on the design made by a Fiverr, the tshirt text …on GIMP or Canva. I assume a lot of designers here use Adobe products. (I dont have Adobe nor do I plan to subscribe to it at the moment though Im sure it would make it easier).

Thanks in advance for your suggestions!