I wanted a version that used some X-Acto #11 blades that I had on hand. I made it large enough in diameter to fit most wrapping papers. The blade just slides in when the print is finished. I would recommend gluing it in though.

This version is tested and works as intended.

Features:

Rounded edges to prevent snags
Tapered exit after cutter to prevent snags (in original testing this was a big problem without the taper)
Appropriate diameter for most rolls
Height optimized to lessen printing time (~3 hrs @ 0.3 mm 15%)
Made to use commonly available X-Acto #11 blade instead of a surgical scalpel

I've also included a nested file to print them in bulk more efficiently.

The pictured Christmas tree cutout didn't do well, so I removed it. I might try to add it back later to reduce material usage once I've got the angles right.

Edit: Christmas Tree cutout added back. I haven't had a chance to test it yet, but I will soon. It should save on material usage a bit.

Edit2: Added 70mm ID version for larger diameter paper rolls. Requested by a customer, so I thought I would upload it as well. Original is 60mm ID, which should be fine for 90% of wrapping paper rolls.

Edit3: Added a PLA version that is currently untested to help with layer adhesion issues.