A sink-base drip tray must fit the entry and the overflow path

A fitted tray is not a waterproof sink cabinet

Choose a sink-base tray by its entry route and plumbing layout as well as its finished footprint. A rigid tray may match the floor perfectly but be impossible to introduce after a center stile, drain and disposal are in place. For new cabinetry, this is an assembly-sequence decision worth making before the sink base is built.

Rev-A-Shelf describes its rigid SBDT tray for new sink bases: it holds minor leakage and directs excess toward the cabinet front and floor. That front discharge is part of the stated behavior, not a guarantee that water will stay inside the cabinet.

Reading note: Rev-A-Shelf — SBDT Polymer Trim-to-Fit Drip Tray.

Fit involves more than the bottom panel

The cabinet's interior width differs from the clear door opening. Hinges, a face-frame rail or a fixed center stile can restrict entry. Tilting a tray requires overhead room; the sink bowl and plumbing may remove it. Do not assume that a rigid tray can be folded or that a fixed stile can be removed. An installer can resolve the assembly sequence while the cabinet is still open, but a footprint drawing alone cannot resolve a retrofit.

The manufacturer notes that plumbing configuration may require trimming. A hole or notch interrupts the tray boundary; do not assume that an improvised opening retains the original containment behavior. Use the applicable product detail for the actual pipes rather than treating any sheet cut to size as equivalent.

The same floor, two different purchase decisions

For a new sink base, the proposed tray matches the interior footprint. The cabinet can receive it before the sink and plumbing obstruct the opening, and the approved pipe detail leaves its intended front discharge route clear. The tray is included in the cabinet package and installation sequence.

An existing cabinet has the same floor size but a fixed center stile, a disposal and pipes that prevent the tray from being tilted through either door opening. The rigid tray is rejected for that retrofit. A smaller or flexible product would be a different option requiring its own fit and containment review; cutting this tray into pieces is not an equivalent solution.

Keep the water route visible

Storage bins should not block the front discharge or cover the entire tray so that a small leak remains unseen. A pullout's fasteners and travel also need a compatible detail; adding storage later can compromise the arrangement selected with the tray. Existing moisture damage should be assessed before any liner hides the floor. The useful purchase is a tray that can be installed as intended, inspected and removed when necessary—not an assurance that the cabinet or room can absorb an unresolved leak.