bttn might be a bit more popular than Sewport. We know about 2 links to it since March 2021 and only 2 links to Sewport. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Vist sewport.com, or sourcingplayground, they are platforms to connect buyer and supplier. There are low MOQ manufacturers there (as low as 10 pieces per design), suppliers will contact you with their quotes, ask them to provide streetwear portfolio, then you'll be alright :). Source: over 2 years ago
In addition to Etsy, Sewport (https://sewport.com/) might be a good option. You submit a project idea and get proposals from people that can fulfill it. Source: over 2 years ago
As many as you can realistically sell. How about a button with 4G? Source: over 2 years ago
Https://bt.tn/ should do you for the hardware. Source: about 3 years ago
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