Embroidering on a T-shirt?

I have net even picked up any supplies yet; but I want to know if the hoop will leave a ridge on a T-shirt that is embroidered. If so, what would you suggest to get that cirle out?

It will, but you can wash the shirt and remove the hoop bump. :)

You may also want to use a stabilizer to embroider if the fabric is stretchy!