
Tried a black sharpie (below) and a purple gel pen (above). Both had blood problems. But Sharpy was worse. So I'm deducting 2 stars. They're small, but that's to be expected. There is one larger size available. But I would really prefer a writing surface that could work with the marker without the bleeding happening. It was a disappointment.

7Colors-21Pack Reusable Silicone Twist Ties With Strong Magnets For Organizing Cables, Hanging Stuff, USB Cords & Fridge Magnets - Fironst 7.48" Magnetic Cable Ties
32 Review

Heavy Duty 8 Inch Nylon Self-Locking Cable Zip Ties - 100 Pack In Black
52 Review

50Pcs Adhesive Cable Clips, Cord Holder Wire Management For Car, Office And Home (Black)
42 Review

Organize Your Cords With LuBanSir'S 3 Pack Extension Cord Storage Straps
27 Review