well if you are doing it on a site like redbubble or society6 or those tshirt sites, you dont need any equipment bc they do all the work, you just a very small profit that way though, i get maybe 30 cents per sticker sold..? for stuff like tshirts you get a few bucks..etc

copyright wise ur not spposed to be able to sell merch of other franchises but for most things its not that heavily enforced however on redbubble they crack down on stuff like pokemon if you tag it as pokemon

LASTLY i know you work small so remmeber you have o make these files big so they are actually useable, when u work in sai make ur new canvas in inches not pixels try to use 300 resolution as well for crispness

Do you know the typical resolution needed? And you said at 300 dpi?
Prints for example.. I'm sure redbubble has a guide on how to use it properly.
Starting out on redbubble is mostly to get my foot in the door and gain experience with the type of art required for merch.
I'm sure someday I'll buy some equipment to make these things at home for cons!

I say 300 resolution bc that's the resolution i use especially for big art I'm printing out like for art shows or judging

300x300?
That's pretty small ;;
300 dpi sounds right

oh yeah i mean 300 dpi omg, im used to calling it resolution

for size it just depends on what ur going for, always aim big as you can just shrink it later if its too big, im not sure what size i used for tshirts ill have to check

i think i use 20x20 inches minimum (though im now noticing when i saved as png sai brought it down to 72 dpi LOL so watch out for that

300 dpi for sure, they have guide lines but usually 10inches for your canvas size is good.

300 dpi resolution for anything printed on a t-shirt, as stickers, on fabric, etc. But you can always go bigger. Anything you intend to make a print, or print on something larger than say 24" across you might want to even bump up to 450 or 600 DPI. Billboards and outdoor large format advertisements are done in 600 DPI. My comics professor made us do 600 DPI for everything we intended to print in a book. Always better to have extra space rather than not enough. Sizing down is easier than sizing up once your resolution is locked in.

I have not had personal experiences with redbubble. And I will say, making and printing merchandise while you are financially unstable is AWFUL. I just did that for BLFC and burned through 75% of my overall funds to make bulk orders of everything. Eventually it is better that way because you get a lower vendor cost/higher return of profit, but it can be really scary when you're just starting out. Redbubble may be good until you get enough funds to print in bulk on your own (especially for things like stickers and prints). You'd get less profit, but you're also putting less of your own money down in the mean time.

For tiling textures or images, look into the 'offset' function in photoshop. It can be navigated to under Filter > Other > Offset. You should be able to find tutorials that can explain it better than I can.

Also important to note--developing merch can be really, really distracting from other owed work. I've learned this also from personal experience. I had a hefty queue I wanted to clear out before BLFC but I also wanted to make merchandise for the con, and I made the incorrect decision to make merch instead of do preexisting work. Now my queue is 2x as long and a month behind.

It's really important to remember that when you make new merchandise you are doing so on your own (unpaid) time. Eventually that merchandise will pay for the time you put into it, but not right away. It's not an immediate return. I'm not allowing myself to make new merch until I have cleared my queue substantially/I have time to do personal work again. It took me a month of nonstop 8+ hour a day work to make 4 designs that I then turned around into sticker sheets, lanyards, and prints but now I'm feeling the pressure of other work slowly building on my shoulders and I'm trying to fight the urge to flee from the pressure.

I figured you might be able to relate to that feeling, and situation. If I can help you avoid making the same mistake I did, I wanted to make sure I say something. I'm definitely not trying to turn you off from it and I'd love to see some merchandise from you! I just want to make sure I impart my own experiences so you don't rush into this like I did. I would spend a good amount of time planning out what you want to make, estimate how long it will take you, and then use making some merch as an incentive to clear out your existing workload before you start.

I wouldn't recommend selling anything with MLP or any other Disney property, if they find out you will hear from their lawyers.

I sell a few things on redbubble - they don't do charms, but they do a LOT of other stuff! And you can have the same design on multiple products. ^^
300dpi is what I use for my work, but they also give you pixel dimensions required for each type of product, so you can look it up and adjust accordingly. I normally save mine around 32 x 32 inches as a base.

The good thing about redbubble is you can order your own designs for yourself at the cost of materials, rather than the retail price! I also believe they offer deals for mass-ordering so you can sell at cons. ^^

As for copyrighted stuff... you CAN sell it, but definitely expect it to be taken down, your account closed, etc. if the companies who own the copyright find out and don't like what you're doing. Of course, not tagging it with the franchise would help keep you under the radar for a while, but it's safest to just stick to your own, original designs. Harder to sell, but won't get you dinged with copyright infringement claims! MLP OCs would likely be fine, because cute stylized ponies aren't exactly under copyright to Hasbro - only their canon characters are.