12 orange to yellow color changing 3-D printed stitch markers!
 
Guys, how stinking cool are these?! Each stitch marker is printed on our home 3D printer. These will change color with the warmth 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.