How to frame a 16 × 24 print without edge slip

Cut the mat window to 15.5" × 23.5" (0.25"/side overlap) so your 16"×24" print never slips through; adding a 2" mat requires a 20"×28" frame.

Cut mat window: 15.5" × 23.5" (at 0.25"/side overlap)
Frame glass size (2" mat): 20.0" × 28.0" inner rabbet
Outer footprint (1" molding): 22.0" W × 30.0" H per frame

By Clara Vance, Architectural Scale & Framing Editor Updated 2026-10-21

A walnut picture frame and a deep ivory mat on a wood console. AI-generated framing inspiration. — AI-generated room inspiration. Refer to the blueprint drawing and tables below for exact dimensions.

Wall-to-Furniture Scale Blueprint

Pre-loaded: 72" Sofa · 2× 16"×24" Prints + 2" Mat (15.5"×23.5" Opening) + 1" Frame = 47" Span (65.3% Ideal)

Open in calculator

Proportional wall elevation. Tap Enlarge drawing to inspect full-size inch callouts.

47" W × 30" H art span · 65.3% of a 72" sofa · Top nail: 69.5" from floor.
Fits 96" ceiling with 24" upper margin (top edge at 72" from floor). Paired with an 8x10 ft rug and four 18" × 18" pillow covers.

How we calculate these dimensions (and when to adjust)

Formula used: Mat Window = Print Size - (2 × Overlap). Inner Glass = Print Size + (2 × Visible Mat Border). Outer Frame = Inner Glass + (2 × Molding Width).
Default calculator assumptions: Our calculator uses a 0.25" per-side mat overlap (-0.5" total window reduction) as the default conservation assumption for 16"×24" prints.
When to break the rule: Mat overlap is not identical across every supplier: while ready-made mats (like Blick or Michaels) typically deduct 0.25" per side (15.5"×23.5" opening), custom online mat cutters such as Frame Destination use 1/8" per side (0.125" overlap = 15.75"×23.75" opening) on smaller or precision-mounted sheets. Always check the cut opening spec before taping.

16"×24" Print to Mat Window, Inner Glass & Outer Frame Conversion Table
Mat Border Width	Cut Mat Window (0.25"/side)	Required Frame / Glass Size	Outer Frame (1.0" Molding)	2-Frame Diptych Span (3" Gap)	Best Sofa Match (60%-75%)
0" (Unmatted)	16.0" × 24.0" (No Mat)	16.0" × 24.0" Frame	18.0" W × 26.0" H	39.0" W (2 Frames)	60"-64" Loveseat (or 3-Frame on 84" Sofa)
1.5" Narrow Mat	15.5" × 23.5" Opening	19.0" × 27.0" Frame	21.0" W × 29.0" H	45.0" W (2 Frames)	68"-74" Apartment Sofa (62.5% on 72")
2.0" Gallery Mat (Standard)	15.5" × 23.5" Opening	20.0" × 28.0" Frame	22.0" W × 30.0" H	47.0" W (2 Frames)	72"-78" Sofa (65.3% Ideal on 72" Sofa)
2.5" Exhibition Mat	15.5" × 23.5" Opening	21.0" × 29.0" Frame	23.0" W × 31.0" H	49.0" W (2 Frames)	74"-80" Sofa
3.0" Architectural Mat	15.5" × 23.5" Opening	22.0" × 30.0" Frame	24.0" W × 32.0" H	51.0" W (2 Frames)	78"-84" Sofa (60.7% on 84" Sofa)

Swipe or scroll the table to compare all measurements.

1. Why a 16×24 Print Never Uses an Exact 16.0" × 24.0" Mat Cutout

The most common mistake first-time framers make is ordering a mat board with an exact 16.0" × 24.0" window opening for a 16"×24" print. Without overlap around the perimeter, humidity changes cause the paper to bow forward and slip through the bevel.

Our calculator defaults to a 0.25-inch single-side overlap (deducting 0.5 inches from both width and height to produce a 15.5" × 23.5" opening). That 1/4-inch shelf gives you ample margin to T-hinge heavy art paper with acid-free linen tape. Note that some specialty custom cutters (such as Frame Destination) default to a tighter 1/8-inch per-side overlap (15.75" × 23.75" opening) when preserving edge signatures—so always verify whether your mat supplier deducts 1/4" or 1/8" per side.

2. Finding the True Outer Frame Footprint: 16×24 vs. 20×28 vs. 22×30

Frame sizes sold in the US always refer to the inner glass/rabbet dimension, not the outer wall footprint. If you frame a 16"×24" print without a mat, you buy a 16"×24" frame; the frame molding lip overlaps the print edge by ~0.25", and a 1.0" molding adds 2.0" to the outside (18.0" × 26.0" on the wall).

When you add a 2.0-inch visible mat border on all four sides, the required frame size jumps to 20" × 28" (16" + 2" + 2" by 24" + 2" + 2"). Once you add a 1.0-inch wood molding on each side, the outer wall footprint reaches 22.0" W × 30.0" H.

3. Pairing Two 16×24 Matted Prints Above a 72-Inch Apartment Sofa

Because a single 22"×30" matted frame is too narrow for a sofa (covering only 30.5% of a 72" apartment couch), pairing two matted 16"×24" frames side-by-side as a diptych is one of the most versatile small-space layouts.

Two 22"-wide frames separated by a 3.0-inch gap span 47.0 inches total—hitting 65.3% of a 72-inch sofa (right inside the 60%–75% target zone) and rising 30.0 inches vertically for balanced presence under an 8-foot ceiling.

Cross-Brand Framing, Tolerance & Scale Comparison

Published mat opening rules, frame rabbet sizes, and return terms checked against linked supplier pages (October 2026).

Known Elsewhere (KEW) $38-$145

Best for: Ordering true 2:3 ratio 16"×24" prints that drop into standard 20"×28" matted frames without trimming.

Skip if: You require anti-reflective museum glass pre-mounted in sizes above 36".

Blick Art Materials $42-$95 per frame

Best for: DIY framers buying an off-the-shelf 20"×28" frame with a pre-cut 16"×24" mat board.

Skip if: You want your print dry-mounted and delivered ready to hang out of the box.

Frame Destination $35-$130 (frame + custom mat kit)

Best for: Photographers who print a narrow white border and want a precise 1/8" mat overlap.

Skip if: You do not want to assemble hardware, backing board, and glazing yourself.

Brand / Studio	Size coverage	Frame & mat tolerance	Price (USD)	Best for	Skip if
Known Elsewhere (KEW)	Native 16"×24" (2:3) and 18"×24" (3:4) archival prints	Printed with 0.25" edge-safe margin so important linework never hides under a 15.5"×23.5" mat bevel	$38-$145	Ordering true 2:3 ratio 16"×24" prints that drop into standard 20"×28" matted frames without trimming.	You require anti-reflective museum glass pre-mounted in sizes above 36".
Blick Art Materials	Ready-made 16"×24" and 20"×28" wood & metal gallery frames	Pre-cut 4-ply acid-free mats with 15.5"×23.5" window (0.25"/side overlap)	$42-$95 per frame	DIY framers buying an off-the-shelf 20"×28" frame with a pre-cut 16"×24" mat board.	You want your print dry-mounted and delivered ready to hang out of the box.
Frame Destination	Custom-cut mat boards and sectional aluminum/wood frames to 1/16"	Uses 1/8" (0.125") per-side overlap on standard custom openings or user-specified exact cut	$35-$130 (frame + custom mat kit)	Photographers who print a narrow white border and want a precise 1/8" mat overlap.	You do not want to assemble hardware, backing board, and glazing yourself.

First column stays pinned as you scroll horizontally to inspect full specifications.

Your framing & sizing questions

What size frame do I buy for a 16x24 print with a 2-inch mat?

Add twice the mat width (2" × 2 = 4") to both dimensions of your 16"×24" print: you need a 20" × 28" frame (inner glass size), which will have an outer wall footprint of 22" × 30" with a 1-inch frame molding.

Does a 2-frame diptych of 16x24 prints fit above a 72-inch apartment sofa?

Yes - two 16"×24" prints with 2" mats and 1" frames measure 22" wide each. Hung with a 3" gap between them, they span 47" total, which is 65.3% of a 72" sofa (right in the middle of the 60%-75% golden range).

How we calculate these dimensions (and when to adjust)

1. Why a 16×24 Print Never Uses an Exact 16.0" × 24.0" Mat Cutout

2. Finding the True Outer Frame Footprint: 16×24 vs. 20×28 vs. 22×30

3. Pairing Two 16×24 Matted Prints Above a 72-Inch Apartment Sofa

Cross-Brand Framing, Tolerance & Scale Comparison

Your framing & sizing questions

More room for good ideas.

Framebridge vs. Minted vs. Blick: Mat Overlap, Glazing & Cost Matrix

84" Sofa Wall Art: Exact 50"–63" Span & 8×10 Rug Blueprint

9-Frame (3×3) Gallery Grid: 2.5" Spacing & 8-Foot Ceiling Check