This is a scalable Christmas tree with shoes because everything is better with some shoes and a face XD. The first tree is at scale 75% the middle is at 100% and the right one is at 50%. You can go bigger if you want. 

note that the smaller you go the harder it is to get the shoes in. At the scale of 50% you have to push a bit harder than the one on 100%. 
 

3D PRINTING:

You can print this with a layer height of 0.2 (for the 50% tree and the shoes) or 0.3mm. You don’t need supports. 
I would recommend dropping the shoes 1mm lower in the slicer as the shoes are a bit too round in the front. I printed them with 15-20% infill (trees and shoes). 

If you read this in December, Happy Christmas! 
 

I borrowed the shoes from @FatherLicorice and his cute little ghosts.