A transparent image is not a transparent sticker

I have been happy with Sticker Mule until now. However, I uploaded a transparent image and expected that the background would be transparent on the resulting sticker. It is not. So, warning to anyone else making the same costly mistake. You need "Clear Stickers" which are not an option on the list of products. You need to actually search for them in the search box. And within "Clear Stickers", I do not see an option to do them in round. I will have to find another provider.