Get the Right Fit
Hardware Size Guide
Choosing the right size hardware is essential for both function and aesthetics. Use this guide to find the perfect fit for your cabinets.
Measuring for Pulls
Cabinet pull sizing is described by the center-to-center (C-to-C) measurement — the distance between the centers of the two mounting holes. This is not the overall length of the pull.
To measure: use a ruler or tape measure to find the distance between the centers of your existing screw holes. Match this measurement to a Knobs.co pull with the same C-to-C dimension.
Pro tip: If you're drilling new holes, choose your pull first and drill to match. Standard C-to-C sizes (3", 3 3/4", 5 1/16") are easiest to source in the future.
Pull Size Reference Chart
| Center-to-Center | Recommended Use |
|---|---|
| 3" | Small drawer fronts (under 12") |
| 3 3/4" | Small to medium drawers (12"–18") |
| 4"–5" | Medium drawers (18"–24") |
| 5 1/16"–6 5/16" | Medium to large drawers (18"–30") |
| 8"–10" | Large drawers (over 24") |
| 12"–18" | Appliance pulls, large cabinet doors |
Knob Sizing
Knobs are measured by their diameter (the widest point of the knob). Unlike pulls, knobs mount on a single screw — so there's no C-to-C measurement. The most common kitchen and bath knob sizes are 1 1/4" to 1 1/2".
| Diameter | Type | Best For |
|---|---|---|
| 5/8" | Extra Small | Jewelry boxes, very small drawers |
| 3/4" | Small | Small drawer fronts, delicate cabinetry |
| 1" | Standard Small | Most cabinet doors and drawers |
| 1 1/4" | Standard | Kitchen cabinets, bathroom vanities |
| 1 1/2" | Standard Large | Kitchen cabinets, shaker doors |
| 1 3/4"–2" | Large | Statement pieces, oversized doors |
Do You Need a Backplate?
Backplates serve two purposes: they protect your cabinet finish from wear around the hardware hole, and they add an extra layer of decorative detail. They're especially recommended for painted cabinets.
Knobs.co offers matching backplates for many collections. If you're replacing hardware with different hole spacing, a backplate can also cover the old holes.
Still unsure? Our sample program is the best way to verify fit and finish before committing to a full order. Order 1–2 pieces, mount them on your cabinets, and see exactly how they look and feel in your space. If you have specific sizing questions, our team is happy to help — contact us any time.