I'll hold my hands up - I've never watched Jem and the Holograms (that I can recall) but I was asked by my other half.

So, here's an (under duress) listing for a 3D printed Jem logo. The logo is designed for display on a shelf or similar and comes with a detachable foot that goes in the bottom (please note that as I'm perpetually tinkering with things the stand may not be in the same place as I'm not convinced it's the best place for it where it is at the moment). It's not particularly heavy so if you're wanting it on a wall or something just shove sticky fixers or Blu Tack on the back.

The logo size is (approximately)

W = 144mm

H =  130mm

D =  10mm

Please note that as with anything 3D printed there are caveats about the printing process and potential imperfections in the print. To get the best possible finish I use a few different techniques within the print, predominantly ironing and Hilbert curve. If you want to please zoom in to the photo as it's commensurate with what you can expect to receive. They photograph terribly but look amazing when displayed (I appreciate I would say that but they do). Please also note that I design all the things I print; I don't buy the STL files in - I grew up in the 80's and 90's so have a lot of love for the designs I do and want them to be the most accurate they can be. 

Please feel free to check out the other bits I have in my store as there might be something that takes your fancy. Possibly. And any questions please give me a nudge.

Thanks!