The Quick Verdict
Get the Fiberbuilt Performance Turf Tee Box 4×4 for most setups. At $499 list it's $700 less than the Grass Series Traditional 5×4, and if you're not specifically chasing that Fiberbuilt Grass hitting panel, you don't need to pay for it. The Grass Series is worth the premium if you want the dedicated grass-fiber hitting panel and its 300,000-shot guarantee — that panel is the whole point of that mat, and it's genuinely different from uniform turf. But for a versatile tee box that lets you set up anywhere on the surface, the Tee Box 4×4 is the easier call. Check price at PlayBetter →
What They Have in Common
Both are Fiberbuilt mats on rubber foundations with Performance Turf, both let you push a real tee straight into the turf, and both carry the same warranty structure: 1 year on the turf, 5 years on the rubber base. That warranty split is worth knowing — the turf gets one year, the base gets five, on both.
Where They Differ
The hitting surface
This is the real fork. The Grass Series Traditional 5×4 is a two-component mat: a 4×4 Performance Turf stance area plus a separate 1×4 Fiberbuilt Grass hitting panel offset to one side. That Grass panel is the mat's whole argument — it's what carries the 300,000-shot guarantee and what you're paying $700 more for. The Tee Box 4×4 is uniform Performance Turf across the full 49×49 inches. No separate panel, no dedicated hitting zone. You hit from wherever you stand.
Which matters: Fiberbuilt doesn't publish whether that Grass panel can be replaced on its own. The Tee Box has no replaceable strip — the entire surface is one piece, so when it wears, it wears. Fiberbuilt doesn't publish a parts list for the Tee Box, so there's no documented path to replacing just the worn section.
Size and construction
The Grass Series measures 60×48 inches. The Tee Box 4×4 is 49×49 inches — square. The Grass Series has a one-piece solid rubber foundation; the Tee Box uses a modular rubber base assembled tool-free. Fiberbuilt publishes the Tee Box's weight at 72 lbs. They don't publish a weight for the Grass Series.
Fiberbuilt also publishes the Tee Box's thickness at 2 inches. They don't publish a thickness for the Grass Series. That 2 inches is the finished height of the Tee Box off the floor — a figure you can measure your own setup against. The Grass Series leaves you without a number to check.
Tee setup and a labeling oddity
Both mats allow a real tee anywhere in the turf. The Grass Series also ships with a rubber tee and a friction-fit tee holder for the 4-hole Grass panel, and Fiberbuilt's Adjustable Tees are designed for that panel — though those are listed as temporarily discontinued. One thing to flag: the Grass Series product page lists the included rubber tee as 2.265 inches, where every other Grass panel listing from Fiberbuilt says 2.625 inches. I don't know which is right, and I don't work at Fiberbuilt.
Price
The Tee Box 4×4 lists at $499. The Grass Series Traditional 5×4 lists at $1,199 — a $700 gap at list.
Who Should Buy Which
Fiberbuilt Grass Series Traditional 5×4 if:
- You specifically want the Fiberbuilt Grass hitting panel and its 300,000-shot guarantee
- You prefer a one-piece solid rubber foundation over modular assembly
- The offset hitting-zone layout suits how you've positioned things in your bay
- You're okay with Fiberbuilt not publishing thickness or weight, or you've confirmed the specs by other means
Fiberbuilt Performance Turf Tee Box 4×4 if:
- You want to hit from anywhere on the surface without a fixed hitting zone
- $499 is more in line with what you want to spend
- You want to know the mat is 2 inches thick and 72 lbs before it arrives
- You're considering the 5×5 or 6×6 versions down the line — the same line scales up, same surface
- Your setup doesn't need a dedicated Grass panel
The Bottom Line
The Tee Box 4×4 is the practical buy for most people. It's $700 less, it publishes its weight and thickness, and uniform Performance Turf handles the job most golfers are setting up a home bay for. The Grass Series Traditional 5×4 makes sense if you want that dedicated Grass panel — that's a real distinction, not just a marketing tier — but the premium is steep, and Fiberbuilt leaves you guessing on thickness and weight at that price point.