Modern Mail Slots - Standard and Large Sizes Available

Types of Mail Slot Options

This category carries door mail slots in stainless steel and brass, standard and large sizes, and front-only, rear-only, or full sets. Here's what's in and what isn't:

• Available currently: Door mail slots

• Not carried here: Through-wall chutes, package drops, security drop boxes

Door Mail Slot

Door mail slots mount through the face of a front entry door. Here's what to confirm before ordering:

• Front plate: A letter plate, which is a spring-loaded flap, covers the opening on the exterior side.

• Rear back plate vs. open-back: Choose a full front-and-rear set or a front-only open-back piece

• Door thickness: Standard residential doors run 1-3/4 in. Both pieces must bridge that gap

• Flap style: Spring-loaded closures seal tightest against drafts

Wall Mail Slot

A door slot handles most residential entryways. Wall installation suits situations where door hardware or construction makes a door cut impractical. Key considerations:

• Install location: Sidelight panel or adjacent wall section, keeping the door itself uncut

• Mail direction: Wall installs pair with a sleeve or chute to guide mail inward

• Fit check: Confirm wall thickness and interior clearance before selecting

Choosing the Right Mail Slot Size

Size determines what fits. Pick wrong and magazines bend, catalogs jam, and carriers skip the slot.

Small / Standard Mail Slots (Approx. 11.8" x 3")

Standard slots cover everyday letter-size mail. Three reasons this size leads residential installs:

• Proportional fit: The 11.8 in. x 3 in. opening sits cleanly on most doors without dominating the face.

• Modern builds: Architects spec this size on contemporary doors where clean lines matter.

• Everyday volume: Standard envelopes, flats, and small mailers pass through without folding.

Large / Magazine Mail Slots (Approx. 15.7" x 3.9")

Large slots eliminate the bent-corner problem in households receiving catalogs and oversized mail. 

Three advantages:

• Magazine clearance: Full-size magazines and catalogs pass through flat.

• Higher volume: High-frequency households avoid daily jams at the flap.

• Less damage: Carriers push thick pieces through without forcing.

Premium Finish, Function & Protection: All in One Mail Slot

Finish determines longevity. The right material handles UV, moisture, and daily contact without degrading.

Stainless Steel Mail Slots

Stainless steel is the right choice for exterior doors. It resists corrosion without any coating to chip, peel, or maintain, and holds a brushed or polished face for years under direct sun and rain. Modern entries pair naturally with its clean, flat geometry.

Brass & Premium Finish Options

Brass delivers a warmer architectural presence that stainless can't replicate. Traditional and executive-style entries look more intentional with a brass letter plate. The Streetscape Executive Brass Mail Slot (Model SI-181) is the benchmark: solid construction, warm finish, proportions scaled to formal entry doors.

Front & Rear Piece Configurations

Three configuration options cover new installs, exterior replacements, and interior retrofits.

Front & Rear Mail Slot Sets

New installs need both pieces. The front plate handles weather sealing and exterior appearance. The rear plate finishes the interior and catches incoming mail. One order delivers a matched pair with consistent finish and screw spacing.

Front Piece Only

Exterior replacement and finish upgrades both call for a front-only piece. Homeowners swap the front plate when the rear is intact but the exterior shows corrosion, wear, or an outdated finish. Make sure the opening width and screw hole spacing match the current rear piece before placing the order.

Rear Piece Only

Interior replacement fits retrofit situations where the exterior plate is sound but the hinge has worn or finish has faded. Measure the existing cutout and confirm frame depth first.

Why Choose a Modern Stainless Steel Mail Slot?

Four reasons buyers choose stainless for exterior door installs:

• Exterior-rated durability: No coating to chip, peel, or oxidize.

• Sleek architectural upgrade: Brushed and polished faces replace dated hardware without a full door renovation.

• Modern door integration: Clean geometry and standard screw spacing fit contemporary entry doors without modification.

• Two sizes: Standard (11.8 in. x 3 in.) and large (15.7 in. x 3.9 in.) for every delivery volume.

• Quantity discounts: Property managers and multi-door buyers get automatic price breaks at 2 or more units.

How to Install a Mail Slot in a Door

Measure twice. A miscut door can't be uncut. Work through this section before starting.

Tools & Materials You'll Need

Gather these before starting:

• Tape measure: Opening dimensions and door thickness

• Pencil or painter's tape: Marking the cutout

• Drill and bits: Corner starter holes

• Jigsaw or multi-tool: Cutting the opening

• Screwdriver: Fastening both plates

• Safety glasses: Required during cutting

• Your mail slot: Size and configuration confirmed

Step-by-Step Installation Overview (Door Mail Slot)

Work through these in order. Skipping the dry-fit causes misaligned holes and a forced fit.

1. Measure and confirm: Verify opening dimensions against product specs.

2. Mark the cutout: Use the manufacturer template. Tape both door faces.

3. Drill starter holes: One at each corner.

4. Cut the opening: Jigsaw, fine-tooth blade, cut inside the line.

5. Dry-fit both pieces: No fasteners. Confirm alignment and clearance.

6. Fasten hardware: Finger-tight, align, then snug. Don't overtighten.

7. Test the flap: Confirm smooth operation and full closure.

8. Seal the edges: Seal cut wood edges to block moisture.

Measuring Checklist

Confirm these four dimensions before purchasing:

• Opening width x height: What the product requires, not an assumed standard.

• Door thickness: Both pieces must span the full depth without a gap.

• Interior clearance: No lock hardware or bracing should block the rear plate.

• Configuration: Front-and-rear, front only, or rear only decided before checkout.

Replacement vs. New Cut Installation

Replacement installs require matching the existing opening and screw hole spacing. New cut installs require confirming door construction: solid wood accepts a jigsaw cut, while metal or fiberglass may need a professional if reinforcement sits near the planned opening.