How to Ship a Mirror
Ship a mirror in a four-piece telescoping mirror box: 30×40×3.5" ECT-32 covers mirrors up to about 30×40 inches, and 40×60×3.5" covers larger pieces. Tape an X across the glass, protect the corners, wrap it in bubble, and keep it on edge, never flat.
| Mirrors up to ~30×40" | 30×40×3.5" mirror box |
| Larger, up to ~40×60" | 40×60×3.5" mirror box |
| Deep frames to ~36×24" | 36×24×4" or ×6" carton |
| Small, heavy thick glass | ECT-44 flat panel box |
Before the mirror goes in the box, run a masking-tape X corner to corner across the glass, fit corner protectors on all four corners, and wrap the whole piece in bubble cushioning. Pack it snug so nothing shifts, label it as glass, and keep it on edge, never flat.
What You Need
Every route below is an inspection path, not a price or availability claim. Open the product page to confirm current details before buying.
- 30x40x3.5" ECT-32 mirror box, 4-piece flat cartons for mirrors up to about 30x40 inches.
- 40x60x3.5" ECT-32 mirror box, 4-piece bundle for large wall and floor mirrors.
- 1" 3M 234 masking tape, 5.9 mil crepe for the X across the glass. Crepe masking tape releases cleanly, so it will not leave adhesive on the mirror face the way carton tape can.
- 4x4" ECT-32 corrugated frame protectors, adjustable corner guards that fold to the frame thickness.
- 24x3x3" EPS foam edge protectors for the long edges of heavy or thick-glass mirrors.
- 3/16" x 24" x 300' bubble cushioning rolls to wrap the whole piece.
- 2x3" Do Not Drop labels for both faces of the finished box.
- Carton sealing tape for the box seams, plus a marker to write GLASS and THIS SIDE UP on the carton.
If the mirror is small, deep-framed, or unusually heavy, one of the alternate box routes in the next section may fit better than a mirror box.
Match the Mirror to the Box
A four-piece mirror box is four flat corrugated sections that telescope together around the mirror, so one box adjusts to many mirror sizes up to its stated maximum. The 3.5 inch depth is the limit to watch: it clears most frames, but a deep decorative frame needs one of the fixed-depth routes instead.
| Mirror situation | Box route | Why it fits |
|---|---|---|
| Framed or frameless mirror up to about 30x40" | 30x40x3.5" 4-piece mirror box | The four sections slide to the mirror's length and width, so the box hugs the piece instead of leaving rattle room. |
| Large mirror up to about 40x60" | 40x60x3.5" 4-piece mirror box | Same telescoping design at the largest size Packrift lists, in ECT-32 kraft corrugated. |
| Smaller mirror with a deep frame, up to about 36x24" | 36x24x4" shallow-depth box or 36x24x6" shallow-depth box | Fixed-size ECT-32 cartons whose 4 or 6 inch depth clears thick frames the 3.5 inch mirror box cannot. |
| Small, heavy, thick-glass mirror | 22x6x16" ECT-44 flat panel box or 28x6x20" ECT-44 flat panel box | Full overlap flaps put two layers of board across both faces, and ECT-44 handles more weight than standard board. |
Measure height, width, and total depth including the frame before choosing. Sizing logic for frames without glass hazards is covered in what size box for picture frames.
Packing Steps
- Measure the mirror. Record height, width, and depth at the thickest point of the frame, then pick the box route from the table above.
- Tape the X. Run masking tape corner to corner across the glass in a large X, pressing it flat as you go. The X stiffens the glass surface against road vibration, and if the glass does crack in transit, it holds the fragments in place instead of letting them grind loose inside the package. Use masking tape only. Carton tape can leave residue or pull at coated finishes.
- Cover the glass face. Cut a piece of flat corrugated slightly smaller than the mirror and lay it over the glass. It spreads any point impact across the whole face.
- Protect the corners. Fit a corrugated frame protector on each corner. Corners take the first hit in almost every drop.
- Add edge protection on heavy pieces. For thick glass or long spans, seat EPS foam edge protectors along the top and bottom edges so the mirror's own weight never rests on bare frame.
- Wrap in bubble. Make two full passes around the mirror with bubble cushioning and tape the seams shut so the wrap cannot slide open. More on cushioning choices in the bubble wrap and foam collection.
- Assemble the box around the mirror. Slide the four sections of the mirror box together over the wrapped piece until the box sits tight against the bubble on all four sides, then tape every seam and every telescoping joint with carton sealing tape.
- Do the shake test. Lift the box and tilt it gently. If you feel the mirror shift, open it and add cushioning until nothing moves.
- Label and orient. Apply Do Not Drop labels to both faces, write GLASS and THIS SIDE UP on the carton, and keep the package on edge through drop-off. A mirror should ride standing up, never lying flat where anything can be stacked on it.
Box and Protection Specs
Specs below come from the product listings. No prices here on purpose: open the product route to confirm current details.
| Product | Size | Board or material | Pack format |
|---|---|---|---|
| Mirror box, 4-piece | 30x40x3.5" | ECT-32 corrugated | 4-piece flat cartons bundle |
| Mirror box, 4-piece | 40x60x3.5" | ECT-32 kraft corrugated | 4-piece bundle |
| Shallow-depth shipping box | 36x24x4" | ECT-32 kraft corrugated | Bundle of 10 |
| Shallow-depth shipping box | 36x24x6" | ECT-32 kraft corrugated | Bundle of 10 |
| Flat panel box, full overlap | 22x6x16" | ECT-44 kraft corrugated | Bundle of 5 |
| Flat panel box, full overlap | 28x6x20" | ECT-44 kraft corrugated | Bundle of 5 |
| Frame corner protectors | 4x4", adjustable | ECT-32 corrugated | Case of 504 |
| Foam edge protectors | 24x3x3" | EPS foam | Case of 150 |
| Bubble cushioning rolls | 3/16" x 24" x 300' | Bubble film | 2-pack |
| 3M 234 masking tape | 1" x 60 yds | 5.9 mil crepe | Case of 36 |
| Do Not Drop labels | 2x3" | Semi-gloss, red and white | 500 per roll |
Freight Is Part of the Price
Mirror boxes are big, light, and bulky, so freight on them is driven by dimensional size rather than weight, and on a small order the freight can rival the price of the boxes themselves. Almost no packaging supplier says that out loud before checkout. Order in the listed bundle and case quantities so the freight spreads across more units, and check the packaging cost and cube index to see how box cube drives landed cost before you buy.
Common Mistakes
- Shipping the mirror flat. A mirror lying flat becomes a shelf for heavier packages. On edge, the glass carries load in its strongest direction.
- Skipping the tape X. It costs a few feet of masking tape and it is the difference between a cracked pane that arrives in one held-together sheet and loose shards grinding the frame the rest of the trip.
- Using carton tape on the glass. Carton sealing tape belongs on box seams. On the mirror face it can leave residue or damage coated finishes. Use crepe masking tape for the X.
- Leaving rattle room. An oversized box with loose fill lets the mirror build momentum between impacts. Telescope the mirror box tight, and pass the shake test before sealing.
- Bare corners. Corners hit first and concentrate the impact. Corner protectors are the simplest protection in the whole kit and they go on in seconds.
- Buying one box at a time. Single-box orders carry the worst freight-to-product ratio. If mirrors ship regularly, buy the bundle and store the flat cartons.
Related Packrift Paths
- What size box for picture frames
- How to pack and ship artwork
- How to ship fragile items
- Moving boxes and supplies collection
- Corrugated boxes collection
- Edge protectors collection
- Bubble wrap and foam collection
- Packaging tools hub
- Packaging cost and cube index
FAQ
What kind of box do you use to ship a mirror?
A four-piece telescoping mirror box. The four corrugated sections slide together around the mirror so the box matches the mirror's length and width. Packrift lists ECT-32 mirror boxes in 30x40x3.5" and 40x60x3.5"; deep-framed or unusually heavy mirrors may fit a shallow-depth carton or an ECT-44 full-overlap flat panel box better.
Why do you put a masking tape X on a mirror before shipping?
The X dampens vibration across the glass surface and, if the pane cracks anyway, holds the fragments in position so they cannot shift or grind inside the package. Use crepe masking tape because it removes cleanly; carton sealing tape can leave residue on the glass.
Should a mirror ship flat or on edge?
On edge, always. Glass on edge carries load in its strongest direction, and an upright package cannot be used as a stacking surface. Mark the carton THIS SIDE UP and keep it vertical through drop-off.
Can I ship a mirror without a dedicated mirror box?
Yes, if the size fits another route. A 36x24x4" or 36x24x6" shallow-depth carton works for smaller mirrors with deep frames, and a 22x6x16" or 28x6x20" ECT-44 flat panel box suits small, heavy, thick-glass pieces. The packing steps stay the same: tape X, face cover, corners, bubble, snug fit.
How much cushioning does a shipped mirror need?
Corner protectors on all four corners, a flat corrugated sheet over the glass face, and two full wraps of bubble cushioning, with foam edge protectors added on heavy pieces. The finished pack should fail to move at all when you tilt the sealed box.