12  Purple to Pink Color Changing 3-D printed stitch markers!
 
Guys, how stinking cool are these?! Each stitch marker is printed on our home 3D printer. These markers will change color with the heat of your hands. 
 
Small - fits up to a 3.25 mm, US 4 needle
Medium - fits up to a 5.5 mm, US 9 needle.  
Large - fits up to a 10 mm, US 15 needle
 
I've been using them and found no issues with snagging.