Good printing, a little thin

I have been impressed by the items I've gotten at Sticker Mule, except for these magnets. They feel quite thin, and I was expecting more durable, somewhat rigid magnets. They're so thin that they are kind of difficult to take off of metal surfaces, you have to use a fingernail to get them off. The color quality and print quality are great, just not thrilled with the weight/thickness. I would order again if Sticker Mule offered a more retail-quality acrylic magnet.