A regulation golf hole is 4.25 inches in diameter and at least 4 inches deep, cut into the green using a specialized tool called a cup cutter. Whether you’re maintaining a course, building a backyard putting green, or just curious about the process, making a proper golf hole is straightforward once you understand the dimensions, tools, and technique involved.
Official Dimensions of a Golf Hole
The Rules of Golf specify a hole diameter of exactly 4.25 inches (108 mm). The hole must be at least 4 inches deep, and a cup liner (the plastic or metal sleeve that sits inside the hole) should be set so its top edge sits at least 1 inch below the putting surface. This ensures a ball drops cleanly into the cup without bouncing off a raised rim. There is some flexibility with the depth of the liner on courses where the soil type tends to crumble or won’t hold up to a deeper setting, but 1 inch below the surface is the standard target.
Tools You Need
The essential tool is a cup cutter, sometimes called a hole cutter. It’s a cylindrical blade attached to a handle, sized to cut exactly 4.25 inches across. Most models have a foot pedal or step plate so you can push the blade into the ground with your body weight, then twist and pull to extract a clean plug of turf and soil. You’ll also need a cup liner to drop into the finished hole and a flagstick to mark it.
Cup liners come in three common materials. Aluminum cups are the most durable option, coated to resist chipping, with beveled bottoms that make them easy to insert and remove. These are best for high-traffic greens that get daily use. Plastic cups are cheaper and work well for backyard putting greens or practice setups where you don’t need the same longevity. Steel cups exist specifically for sand greens and include a removable inner shell for easy maintenance.
Cutting the Hole Step by Step
Start by choosing your location on the green. On a real course, hole placement rotates daily to distribute wear, and the spot should be on a relatively flat area at least a few paces from the edge of the green. For a backyard green, pick a spot that gives you interesting putt lines from multiple directions.
Place the cup cutter directly over your chosen spot and press it straight down into the turf. Use the foot plate to drive the blade at least 5 to 6 inches deep, which gives you enough depth for the liner plus room beneath it. Twist the cutter a full rotation to sever the roots and soil cleanly, then pull straight up. The plug of turf and dirt should come out in one piece inside the cylinder. Set this plug aside carefully if you plan to use it later to fill an old hole location.
Drop the cup liner into the hole and press it down so the rim sits at least 1 inch below the surface of the green. If the hole is too shallow, use the cup cutter to go deeper or scoop out loose soil from the bottom by hand. The liner should fit snugly without wobbling. Insert the flagstick into the center hole of the liner, and the hole is ready for play.
Filling and Repairing Old Holes
When you move a hole to a new location, the old one needs to be plugged so the green recovers quickly. Take the turf plug you removed from the new hole and press it firmly into the old hole, aligning the grass surface as level as possible with the surrounding green. Tamp it down gently and water it to help the roots reestablish contact with the soil below.
If a plugged area or any small section of green looks damaged, the USGA recommends a clever repair technique using the cup cutter itself. Place the center of the cutter over the edge of the damaged spot so the cylinder covers roughly half damaged turf and half healthy turf. Push it down deeper than the root system, then rotate the cutter 180 degrees. This swaps the damaged turf with the healthy turf next to it, effectively shrinking the visible damage into several smaller patches surrounded by more healthy grass. Repeat this around the perimeter of the damaged area. The smaller patches recover much faster because they’re bordered by living turf on all sides.
Building a Hole on a Backyard Putting Green
If you’re installing a putting green at home, you have two main approaches: natural turf or artificial turf. Either way, the hole itself is the same 4.25-inch diameter, but the installation details differ.
For natural turf, you cut the hole with a standard cup cutter just as you would on a course. The main challenge is keeping the grass healthy enough to hold the cup firmly. You’ll want a well-established green with a proper soil profile before cutting holes.
For artificial turf, you cut the hole through the synthetic material before or during installation, then secure a plastic cup liner beneath the surface. The more important concern with artificial greens is drainage. Without proper drainage, water pools in and around the cup, making the surface soggy and unstable. A perimeter drain system works well for this: dig a trench around the green about 4 inches wide and 6 inches deep, line it with geotextile fabric to keep soil from clogging the pipes, lay perforated drain pipe angled toward a drainage outlet, and cover with gravel to within a couple inches of the surface. A compacted gravel or crushed stone subbase beneath the entire green also helps water move through rather than collecting at the surface.
For a simpler backyard setup, you can skip the elaborate drainage and just make sure the ground beneath the cup slopes slightly away so water doesn’t sit in the hole. A few inches of gravel packed below the cup liner gives water somewhere to go. Check periodically that the drain path stays clear of debris.
Common Mistakes to Avoid
- Cutting too shallow. If the liner rim sits at or near the surface, balls will rattle off the edge instead of dropping in. Aim for at least 1 inch of clearance below the turf line.
- Angling the cutter. The cup cutter needs to go in perfectly vertical. A tilted hole means a tilted liner, which affects how the ball enters the cup and makes the flagstick lean.
- Placing the hole too close to the green’s edge. On a real course, the hole should be far enough from the fringe that the surrounding surface is true putting green. On a backyard green, keep it at least 3 feet from any border so you have usable putting surface on all sides.
- Ignoring the old hole. Leaving an unplugged hole damages the green and creates an uneven surface. Always fill old holes immediately and water the plug to speed recovery.