What Size Rug Pad for 5×7 Rug? | The Simple Rule

A rug pad for a 5×7 rug should be 1 to 2 inches smaller on each side, which means about 4’10” x 6’10” for a standard 5′ x 7′ rug.

Buying the right rug pad size is a small detail that makes a big difference. A pad that’s too large will peek out from under the rug, creating a tripping hazard and making the edges curl. The fix is simple: size the pad so it stays completely hidden beneath the rug. Here’s the exact rule and how to get it right.

Why the Pad Should Be Smaller Than the Rug

The most common mistake is buying a pad the exact same size as the rug. That’s wrong, and multiple sources agree on why. A pad that matches the rug’s edges will show at the sides, collect dust, and cause the rug’s edges to curl upward over time. The pad should sit inside the rug’s footprint so it’s invisible from above and doesn’t create a raised lip. For a 5×7 rug, subtract about 1 to 2 inches from each side — producing a pad that measures roughly 4’10” x 6’10”.

Retailers sometimes sell a standard “5×7 rug pad,” but that label is a nominal product size, not a recommendation. You still need to trim it or choose a smaller option to get the proper fit.

Measuring Your Rug and Trimming the Pad

Measuring is straightforward, but one detail trips people up: ignore the fringe. Measure only the rug’s woven body — do not include tassels, fringe, or decorative ends. Subtract 1 to 2 inches from both the length and the width of that measurement to find your target pad size. If you already have a pad that’s slightly oversized, you can trim it down.

To trim a rug pad to size, lay it flat on a protected surface. Center the rug on top of the pad. Using a marker, trace the rug’s outline onto the pad, then draw a second line inside that outline by the amount of your chosen inset (1 or 2 inches all around). Cut along the inner line with sharp scissors or a utility knife. The finished pad should be fully hidden under the rug.

Thickness and Floor Compatibility

Size isn’t the only factor — thickness and floor type matter too. Typical rug pads range from 1/16 inch to 1/2 inch thick. A quarter-inch pad works well for most residential uses. Go thinner if you have low door clearances, and thicker if comfort is the priority.

Floor type is critical, especially with luxury vinyl plank (LVP) flooring. Some rug pad materials can cause a chemical reaction that stains or damages LVP surfaces. If your rug sits on LVP, use only a heat-pressed felt pad or one specifically labeled LVP-safe. The same caution applies to hardwood and other sensitive floors — check the pad’s material compatibility before you buy.

Adjusting for Thicker Rugs

Thicker rugs need a slightly larger inset. While 1 to 2 inches per side works for standard rugs, heavier or plush rugs may require subtracting 2.5 to 3 inches per side to prevent the bulk from pushing the pad outward. This is less common for a 5×7 rug but worth knowing if yours is unusually thick.

If you’re looking at rug sizes slightly larger than 5×7, check out our roundup of the best 7×10 rugs for your space for options that work in larger rooms.

Common Mistakes to Avoid

• Buying an exact-match pad. A pad the same size as the rug will stick out and cause curling. Always go 1–2 inches smaller per side.
• Measuring with fringe included. Fringe is decorative, not part of the rug’s functional edge. Exclude it from your measurement.
• Ignoring floor type. A pad that’s fine on carpet can damage LVP or hardwood. Check for LVP-safe labels on any pad you buy.