Repack Seals and Numbered Mystery Pack Stickers

Repack selling runs on batch work. You build sixty bags on a Sunday, load the mylar, run the heat sealer, shoot one stack photo, and ship them out over the next three weeks. Repack seals are the one thing on that bag that differs for every unit: a die-cut holographic foil label, printed with your brand, carrying its own number. Numbered mystery pack seals give each bag a name — SR-0142, DROP7-018 — so when a buyer messages about “my pack,” you are both talking about a specific bag.

Unnumbered repacks all look the same — including to you

Most sellers hit this by their second drop. Sixty mylar repack bag units, same artwork, same crimp, same weight. A buyer says the bag arrived open. Another says the toploader inside was empty. You open your camera roll and find one overhead shot of sixty identical black bags. Nothing in it ties to the unit in that buyer’s hands.

A number changes what you can say. Bag SR-0142 was built on the 14th, photographed closed with the number in frame, packed under order 1187. That helps document what was shipped, and gives your replies something concrete instead of a memory. It also helps deter swaps and return fraud.

Number as you fill and your build sheet reconciles line by line, so miscounts surface at packing, not three weeks later.

Picking a prefix and a series: SR-0001, drop codes, restock runs

A custom repack sticker series is two decisions: what the prefix says, and where the numbers start. Keep the prefix short — two to six characters reads cleanly at 1.77 x 0.75 in. Three patterns cover most sellers.

• Brand prefix, one long run. SR-0001 through SR-0600. Your initials or shop name, numbers that never restart. Simple to file, and the number doubles as a rough build order.
• Drop codes. DROP7-001 through DROP7-100. A batch code plus a number inside the batch, if you sell in named drops.
• Restock runs. Keep the prefix and set the start number where the last run ended. Run one is PKMN-0001 to PKMN-0060; the restock starts at PKMN-0061.

You set the prefix and the start number in the builder. Within one order, no two seals share a number.

Sequential vs random — and what each signals

• Sequential (SR-0001, SR-0002, SR-0003…) reads like a run and is easy to count and reconcile. The trade-off: it implies a run size. Print 600 and the buyer holding 0587 draws a conclusion about how many exist.
• Random codes imply no order and no run size — useful if you restock continuously and would rather your volume not be readable off the label.
• Batch code plus number is the middle ground: the drop is public, the lifetime total is not.
• No number at all, if you only want branded holographic foil on the bag.

Where mystery pack seals go on mylar, a team bag, or a bundle

The seal is a foil label meant for plastic:

• Mylar repack bag. Across the top crimp after heat sealing, half on the front face and half over the seam, so the number sits in frame in your closed-bag photo. Press down along the crimp ridge.
• Team bag. Over the folded flap, centered. The standard seal fits without wrapping the edge; the folded layout wraps it if you want the number readable from both sides.
• Toploader inside the repack. On the plastic of the holder — never on the card, and never on a holder headed to a grading company.
• Bundles and multi-bag orders. One seal per bag, plus one on the outer polybag if the order itself should be numbered. The Duo layout prints two numbered halves on one label you cut apart, so the bag and the sleeve each carry a numbered half.
• Never on factory-sealed wax. If a sealed pack goes inside the repack as a chase item, the seal does not go on it.

Layouts: portrait and landscape flat, folded portrait and landscape, slab banner, toploader banner, and Duo. The placement guide covers every other format.

What a number does not tell a buyer about what is inside

This matters for how you write your listing. A number is a label on the outside of a bag, not a statement about the contents.

• Nothing about odds. A low number is not a better bag, and a sequential run does not encode where hits sit. The numbering system does not know what you put in a bag.
• Nothing about contents. The number does not describe cards, sets, condition, or count.
• Nothing about value. Do not price by number, and do not suggest a number carries worth on its own.
• Not a grade or an opinion on a card. The optional QR links to a seal record — a page showing the design, the number and the date it was logged. It says nothing about the card.

Listing wording that stays inside the lines describes only the number, the photo and the log: “Each bag carries a numbered holographic seal. We photograph every bag closed with its number visible and keep that photo on file.”

What a seal will not do

• It can be peeled and replaced. It is a printed holographic foil label with adhesive, not a barrier.
• It says nothing about the card inside the bag, the holder, or the bundle.
• It has no standing with any marketplace or grading company. No platform treats a numbered bag differently.
• It does not decide a return. A claim is settled by the platform’s own process. You have a number, a photo and a dated log to reference in your reply.

Repack seal run sizes and cost per pack

Standard seals are 1.77 x 0.75 in (44.96 x 19.05 mm), $6.00 per pack of 12. The minimum order is 60 seals at $30.00, which is 50c each. Volume pricing from there:

Seals	Per seal	Covers
60 (minimum)	50c	one weekend build
120	45c	two drops of 60
600	40c	a month of restocks
1,200	36c	a quarter
2,400	33c	—
4,200	30c	best self-serve rate

Self-serve tops out at 10,008 seals; larger runs are quoted. At the 4,200 rate, numbering adds 30c to each bag you build. Foils are Shattered Prism and Aurora.

For more artwork room or a longer prefix, the Large seal is 2.5 x 1 in (63.5 x 25.4 mm) in either foil: $9.00 per pack of 12, 60 minimum at $45.00 (75c each), then 10% off at 120, 20% at 600, 30% at 1,200 and 40% at 4,200 — 45c each.

Selling display-graded singles alongside repacks? Custom Grading Stickers are a separate product for top loaders and slabs — packs of 12 at $6.00 (50c), down to 40c at 600+, with your own displayed grade. Custom collector display sticker. Not affiliated with or certified by any third-party grading company.

Questions repack sellers ask

Do I have to number every bag in a drop?

No. You can run branded seals with no number, or number only the higher-tier bags in a mixed drop. Most sellers number everything, because a partial system is harder to keep straight than a complete one.

Can I keep the same prefix across restocks?

Yes, and it is the cleanest approach. Set the start number where the last run ended, so run two picks up at 0061. Within one order, no two seals share a number.

Where does the seal go on a heat-sealed mylar bag?

Across the top crimp, half on the front face and half over the seam, with the number visible in your closed-bag photo. Press along the crimp ridge so the foil sits flat.

Can I put a seal on a factory-sealed pack inside the repack?

No. The seal goes on the plastic of a bag, holder or case — never on a card, never on factory-sealed wax, never on a holder headed to a grading company.

What does the QR code show?

It is optional, and points at a page you choose or at the seal record — a page showing the design, the number and the date it was logged. It says nothing about the card.

Pick a prefix, set your start number, and upload your logo in the Serial Seal builder — 60 seals is $30.00 and covers a weekend build. If you sell live too, the same series carries over to your Whatnot shipments, and the repack series numbering guide walks a full drop end to end.