Which kit is better for a standard tub-to-shower conversion?

The 38 x 60 kit. It matches a standard 60-inch alcove and its off-center drain often lines up with existing plumbing.

Which is better for a large walk-in shower?

The 48 x 72 kit. The bigger tray and 128 sq ft membrane roll cover a spacious walk-in, and the center drain suits new construction.

Do they cost the same?

Yes. Both were $469.99 at eBay as of November 4, 2026, with 3 stores selling each new.

Both use the same Schluter waterproofing system; the 48 x 72 kit states a 10-year limited warranty. Lifespan depends more on installation than on kit size.

Can I cut the tray to fit?

Schluter trays can be trimmed at the perimeter, but cut too much and the slope and drain alignment suffer. Pick the size closest to your footprint.

Is one worth the extra?

Neither costs extra here. Choose by footprint and drain location, since the price is identical.

Schluter KERDI-SHOWER-KIT 38" × 60" Complete Tiled Shower System vs Schluter Kerdi Shower Kit with Shower Tray, Curb, Waterproofing Membrane, Strip & Seals, 48" x 72" Tray Size, Center Outlet Position, KSK12201830ABS

Both kits cost the same: $469.99 at eBay as of November 4, 2026. The choice comes down to tray size and drain placement, not price. Buy the 38 x 60 kit for a standard alcove with an off-center drain; buy the 48 x 72 kit for a large walk-in shower with a center drain.

Today the Schluter KERDI-SHOWER-KIT 38" × 60" Complete Tiled Shower System costs $210.48 less at its best price.

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