You don't buy that at a hardware store. I ordered the 8" and yes they are the right length but they are very flimsy and the cable head is very small. In the photo they look like regular zip ties. I will only use them for light use. I recommend not this product.
2-Pack 16In Under Desk Cable Management Tray - Metal Wire Mesh Holder For Desks, Offices & Kitchens (White)
31 Review
25 Pieces Desk Wire Organizer Cable Ties Zip Ties Adhesive Cord Clips Cable Management Cord Keeper Desk Wire Management
25 Review
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
Organize Your Cords With LuBanSir'S 3 Pack Extension Cord Storage Straps
27 Review