How big should my logo be on a custom poly mailer?

What is the 50% width rule for horizontal wordmarks vs square crests?

Graphic designers preparing their first mailer dieline often make one of two errors: they either paste a tiny 2.5-inch website header logo in the middle of a large apparel bag where it looks lost, or they stretch their wordmark nearly edge to edge across 80% of the bag width. When spot-printed custom poly mailers with a logo are stuffed with folded clothing, the flat film bows outward in the center and pulls the left and right edges inward. Using a width-to-bag ratio instead of a single fixed inch measurement solves both problems across every bag footprint. For horizontal wordmarks (where width is at least twice the height), target 45% to 55% of the usable bag width. For square badges, circular monograms or tall stacked crests, target 35% to 40% of the usable bag width so the vertical height of the emblem does not crowd the top fold line or bottom heat seam. That simple ratio leaves 22% to 32% of clean background film on both the left and right sides, framing your mark with boutique whitespace and keeping every letter on the flat front plane.

1. Horizontal wordmarks (aspect ratio 2:1 to 4:1): set logo width to 45% to 55% of flat bag width.
2. Stacked icon + wordmark lockups (aspect ratio 4:3): set logo width to 40% to 45% of flat bag width.
3. Square crests and circular monograms (aspect ratio 1:1): set diameter or width to 35% to 40% of flat bag width.
4. Upper-left or lower-right corner badges: set badge width to 20% to 25% of flat bag width, inset at least 1.5 inches from seams.

What are the recommended logo dimensions for each poly mailer size?

Use the reference table below to pick exact starting width and height dimensions for your brand mark across the six most popular e-commerce mailer sizes. Remember that poly mailer sizes are always listed by usable Width × Height below the top self-sealing lip. If you ship across multiple bag sizes - for example, a 10 × 13 inch bag for single tees and a 14.5 × 19 inch bag for hoodies - scale your logo proportionally for each bag rather than reusing the smaller 5-inch print size on the larger bag. Because CubitPack never charges printing plate or cutting die fees, scaling your logo to match each bag size in your lineup costs nothing extra in setup.

Why should you place your logo 0.5 inches above the geometric center?

If you measure a 10 × 13 inch poly mailer on a flat artboard, the exact geometric center sits 6.5 inches up from the bottom seam. However, once a folded garment is dropped into the bag and the parcel is carried by its top edge or tossed into a mail bin, the weight of the product settles into the lower half of the envelope while the top 2 inches below the adhesive fold pinch flat. Because the bottom half bulges outward toward the viewer and the top half tapers inward toward the seal, a logo placed at the mathematical midpoint appears slightly low to the human eye. Raising your logo's vertical center by 0.5 to 0.75 inches above the geometric midpoint of the usable front face places it on the highest, flattest crest of the packed garment.

Should your logo go on the front face, the back face or the sealing flap?

Every self-sealing poly mailer has two distinct sides: the smooth front face (which ends cleanly at the top opening) and the back face (onto which the 1.5 to 2 inch adhesive lip folds down when sealed). Your primary brand logo belongs on the smooth, un-flapped front face so no fold crease or tape edge ever interrupts your artwork. Use the back face for functional secondary branding that works around the 4 × 6 inch carrier shipping label. When the top adhesive flap folds over onto the upper back panel, it covers the top 2 to 2.5 inches of the back face. By printing a small social handle, website URL or recycling icon near the bottom edge of the back panel - and framing a dashed 4 × 6 inch zone in the middle for your warehouse thermal printer - you keep the front logo completely unobstructed.

What stroke thickness and file settings keep scaled logos sharp?

Scaling a logo from a 3.25-inch print on a 6 × 9 inch jewelry mailer up to a 10-inch print on a 19 × 24 inch coat mailer requires vector artwork (.AI.EPS or vector.PDF) where every letter and icon is drawn as mathematical curves rather than pixels. If you only have a raster PNG or Canva export, our prepress team redraws it into clean vector paths at no cost before creating your proof. When sizing down crests or badges that contain secondary taglines (such as 'EST. 2024' or city names), check the stroke weight at the smallest bag size. On flexible polyethylene film, positive ink lines should be at least 1 pt (0.014 inches) thick, and reversed-out lines (where the base film shows through dark ink) should be at least 1.5 pt thick with font sizes of 7 pt or larger. At CubitPack, every order includes a free 2D digital proof and 3D mockup showing exact millimeter and inch dimensions before payment, 10 to 14 business day turnaround (4 to 5 day rush), and free 50-state shipping. Pair your logo mailers with custom printed poly mailers, custom tissue paper or custom thank you cards for a complete parcel system.

1. File format: vector.AI.EPS or.PDF with all fonts converted to outlines (or free vector conversion by our team).
2. Minimum positive line thickness: 1 pt (0.014 in) so thin serifs print solidly across poly film.
3. Minimum reversed-out line or gap: 1.5 pt (0.021 in) so surrounding ink never pinches fine details shut.
4. Minimum text height: 7 pt for positive spot ink; 9 pt for white ink on matte black film or metallic foil stamping.

What are the most common poly mailer logo sizing mistakes?

Avoid these five proportion and placement errors before approving your digital proof

1. Making a horizontal wordmark wider than 65% of the flat bag width, which causes the first and last letters to wrap around the curved sides once packed.
2. Measuring vertical centering from the top of the unfolded adhesive lip instead of the usable fold line, which shifts the logo 1 inch too high.
3. Using the exact same 4-inch logo print size on both a 10 × 13 inch shirt mailer and a 19 × 24 inch winter coat mailer.
4. Keeping tiny 4 pt 'TM' or tagline subtext beneath a scaled-down logo on a 6 × 9 inch bag where micro-type fills in with ink.
5. Placing the main brand logo in the center of the back panel where the 4 × 6 inch thermal shipping label covers it completely.

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