PSA, BGS, CGC, and SGC use rigid plastic holders with different footprints, thicknesses, corner profiles, and label areas. These differences matter when designing packaging because a cavity made for one holder may be too tight, too shallow, or too loose for another.
A PSA-sized cavity, for example, may be too shallow for a thicker BGS slab. A cavity designed for a larger or thicker holder may leave a slimmer slab free to move. Uncontrolled movement can contribute to scuffed surfaces, chipped holder edges, and cracked cases during transit.
This guide explains how slab formats differ, what can go wrong when an insert does not fit properly, and how to design packaging that protects graded cards during shipping and presentation.
Why a Graded Slab Needs Its Own Packaging Layer
A graded slab is a rigid plastic holder used to encapsulate a card after authentication and grading. Its construction varies by grading company and holder generation, but its primary purpose is to protect the card from direct handling, surface contact, and tampering.
Resistance to humidity, water, and UV exposure varies by holder and should not be assumed. A slab also is not designed to serve as complete transit packaging on its own.
The slab protects the card, while the insert and outer packaging protect the slab. If the holder can shift or bounce inside the package, repeated contact with the cavity walls can damage its edges or surface. A severe drop or crushing force can also crack the case.
An appropriately designed insert reduces this movement. The amount of cushioning it provides depends on several factors, including:
- The insert material
- The cavity dimensions
- The amount of material surrounding the slab
- The insert's ability to compress under impact
- The strength of the outer shipping box
Dense EVA foam, soft PU foam, corrugated board, and paperboard inserts behave differently under impact. The best option depends on whether the packaging is intended mainly for presentation, shipping protection, or both.
PSA, BGS, CGC, and SGC Slab Dimensions Compared
Graded card holders do not share one standardized size. Based on commonly cited independent measurements, a standard PSA trading card slab is approximately 5.375 x 3.2 x 0.25 inches (136.5 x 81.3 x 6.4 mm), while a standard BGS slab is approximately 5.125 x 3.2 x 0.375 inches (130.2 x 81.3 x 9.5 mm). Dimensions are listed as height x width x thickness.
These figures show the general difference between the two formats: a typical BGS slab is slightly shorter but noticeably thicker than a PSA slab. CGC and SGC holders have their own case shapes and thicknesses, which may vary by holder type and generation. Because these measurements are independently reported rather than official manufacturing specifications, verify the physical holder before finalizing an insert.
| Grader | General profile | Fixed-cavity concern | Recommended approach |
|---|---|---|---|
| PSA | Commonly slimmer than BGS holders | A cavity designed around PSA may be too shallow for thicker slabs | Measure the current holder before creating a dedicated cavity |
| BGS | Commonly thicker than PSA, with a different overall profile | A BGS slab may not seat fully in a PSA-sized cavity | Use a BGS-specific cavity or a universal foam design |
| CGC | Profile varies by holder type and generation | Measurements from an older CGC holder may not match a current one | Confirm the exact holder being packed |
| SGC | Distinct case shape and edge profile | A cavity for another grader may leave clearance in the wrong areas | Test the physical slab in a structural sample |
These comparisons are general rather than production specifications. Before finalizing an insert, measure the actual holder or holder generation that will be packed.
Important measurements include:
- Maximum height and width
- Overall thickness
- Corner radii
- Raised edges or surface features
- The position of any retention points
- Space needed for loading and removal
- Any protective sleeve that will remain on the slab
A cavity should retain the slab without forcing it into place. It may also need a finger notch, pull tab, or flexible edge so the customer can remove the holder without pressing against its corners.
Three Problems Caused by Poor Cavity Fit
A mismatched cavity usually creates one of three problems.
- Lateral movement: The cavity is wider or longer than the slab, allowing the holder to slide from side to side. Repeated contact can scuff the surface or damage the holder's edges.
- Excess vertical clearance: The cavity or box interior is deeper than the slab, allowing it to bounce between the insert and lid. This can happen when packaging designed for a thicker holder is used for a slimmer one without a retaining layer.
- Excessive pressure: The cavity is too tight, so loading or removing the slab places pressure on its edges. An overly tight fit can also make the packaging difficult for customers to use.
The goal is controlled retention rather than the tightest possible fit. The correct tolerance depends on the slab, insert material, cavity construction, and intended packing process.
How PackMojo Designs Packaging for Graded Slabs
For a dedicated cavity, PackMojo can design the insert around the dimensions of a specified slab. Precision-cut foam inserts can be developed with a 1-3 mm tolerance, depending on the holder and packaging design.
A structural sample can then be produced to test the fit before moving into production. This makes it possible to check whether the slab seats properly, remains secure, and can be removed without excessive force.
Available insert options include:
- EVA foam inserts for dense, close-tolerance retention
- PU foam for softer and more flexible cushioning
- Corrugated or paperboard inserts for structural support and product presentation
- Material combinations for projects that require both retention and cushioning
The insert can be paired with a rigid box, magnetic rigid box, or another premium type of packaging. For shipping, the finished package should be placed inside an appropriately sized corrugated mailer box with enough protection against drops, crushing, and punctures.
Can One Insert Hold PSA and BGS Slabs?
Yes, but the insert must be designed for both formats.
A single fixed cavity based on one holder may not retain the other reliably. A PSA-sized cavity may be too shallow for a thicker BGS slab, while a BGS-sized cavity may leave too much clearance around a PSA holder.
For mixed inventory, a universal foam insert can use controlled compression and carefully positioned retention points to accommodate both formats. Universal does not mean oversized. The insert material must retain the slimmer PSA holder while compressing enough to accept the thicker BGS slab.
Another option is a multi-cavity insert with separate pockets for each slab type. A dedicated cavity remains the better choice when close alignment and presentation are the priorities, while a universal insert is more practical when the grader changes from order to order.
What Happens if a Grader Changes Its Holder?
Case dimensions have shifted before across generations for every major grader, since none of them publish a fixed spec. This is exactly why PackMojo builds cavities from an actual physical slab rather than a published measurement. If your grader updates its case design, the fix is sending an updated sample slab so the next insert run can be recut to match.
Do I Need a Different Box for a Thicker Slab?
Not necessarily a different box, but you likely need a different insert depth. BGS, CGC, and SGC slabs are generally thicker than PSA cases, so a cavity depth that holds a PSA slab snugly will not be deep enough for a thicker case, causing it to protrude instead of seating flush. The outer box can often stay the same; the insert cavity is what needs to be built for the specific slab thickness you're shipping.
Should I Use Foam or a Paper-Based Insert?
The right material depends on the packaging goal.
- EVA foam is dense and well suited to close-tolerance cavities for high-value slabs. It offers firm retention but needs carefully planned dimensions to avoid an overly tight fit.
- PU foam is softer and more flexible. It can provide gentler cushioning and may be useful for universal inserts that need to accommodate several slab profiles.
- Corrugated board provides structural support and is a paper-based option for larger layouts or multi-slab packs. Its cushioning behavior differs from foam, so the complete package should be tested for the intended shipping conditions.
How Many Units Do I Have to Order?
For rigid boxes and magnetic closure boxes, which are common choices for graded slab packaging thanks to their structural strength, the minimum order is 300 units. That gives you enough volume to justify a custom-cut insert without committing to a print run sized for a much larger operation.
Closing Thoughts
Slab dimensions aren't standardized across PSA, BGS, CGC, and SGC, and they shift over time within each grader's own case generations. That makes a generic insert a real risk for anyone shipping graded cards regularly. Building a cavity around the actual slab, confirmed with a physical prototype before production, is the difference between packaging that protects a slab and packaging that just holds a box shut.
If you're shipping graded slabs at volume and want an insert built around your actual cases, PackMojo's structural design team can work from a physical sample to get the fit right before you commit to a production run.