You're finally ready to display your graded cards on the wall. You've picked out the perfect frame, ordered it, and when it arrives... your slabs don't fit. The frame is too shallow, the foam doesn't compress, and the cards rattle around loose. This is one of the most frustrating—and avoidable—mistakes collectors make. The three major grading companies (PSA, BGS, and SGC) all use different slab dimensions, and these differences matter when you're shopping for display cases, frames, and storage solutions. Here's everything you need to know about slab compatibility to display your collection the right way. Slab Thickness: The Critical Difference The most important measurement for display compatibility is thickness—the depth of the slab from front to back. This determines whether a card will fit securely in a frame, display case, or storage box. Grading Company Slab Thickness Notes PSA (standard) ~5–6mm Most common; used for standard TCG and sports cards PSA (thick cards) ~7mm For thicker memorabilia cards BGS ~7–9mm Thickest major slab on the market SGC ~5.5–7mm Slightly thicker than PSA, thinner than BGS BGS slabs are notably thicker than PSA slabs. This is the single most common compatibility issue—a frame designed for PSA won't comfortably fit a BGS slab, and forcing it can damage both the holder and the frame. Overall Dimensions: Height and Width Thickness isn't the only factor. The overall footprint of each slab also varies. Grading Company Approx. Dimensions Notes PSA 3¼" × 5⅜" (8.25 × 13.65 cm) Industry standard; most display options designed for this size BGS 3⅛" × 5¼" (7.94 × 13.34 cm) Slightly smaller width, more squared-off design SGC ~3" × 5" (7.62 × 12.7 cm) Smallest overall footprint SGC has the most compact slab, making it a space-efficient choice for storage. BGS slabs are wider and more squared, which gives them a substantial in-hand feel but creates bulk for storage. What This Means for Display Products When you're shopping for display frames, cases, or stands, the slab thickness determines compatibility: Frames and Display Cases Premium frame makers now offer specific options based on slab type. For example: PSA: Standard PSA slabs (~6mm deep) are the baseline for most frames CGC: Often fits PSA frames with 8mm foam (slightly thicker to accommodate) BGS: Requires thicker foam (~9mm) to properly secure the slab SGC: Some manufacturers can accommodate; check specific specs Interlocking Modular Frames Products like the BCW Interlocking Graded Card Frames are designed to accommodate multiple grading companies. The clear backing brace adjusts to different slab thicknesses, making them compatible with PSA, BGS, SGC, CSG, and HGA slabs. Wall-Mounted Shelves Acrylic display shelves offer more flexibility than enclosed frames. Products designed to hold "PSA, SGC, BGS and more" work because the slabs stand freely rather than being pressed into fixed slots. Quick Reference: Choosing the Right Display Your Slab Type Frame/Display Requirement PSA (standard) Standard "PSA" frame (5–6mm depth) PSA (thick card) Deeper PSA frame or custom option (~7mm) BGS "BGS" frame (8.5–9mm depth) or adjustable frame SGC Check manufacturer specs; often between PSA and BGS CGC PSA frame with deeper foam (8mm) 4 Tips for Avoiding Compatibility Issues 1. Check Slab Depth Before Buying Most quality frame sellers specify depth compatibility. If they don't, ask before ordering. Some retailers explicitly state that their frames are prepared based on your slab type selection (PSA, BGS, CGC, etc.). 2. Look for Adjustable Options Frames with adjustable backing braces—like the BCW Interlocking system—are ideal for mixed collections. They let you display different slab types in the same grid without purchasing separate frames for each grading company. 3. Be Aware of Thick-Card Exceptions Both PSA and BGS offer deeper slabs for thicker cards (memorabilia, patch cards, jumbo cards). A frame designed for a "standard" PSA slab won't necessarily hold a PSA "thick card" slab. If you're displaying memorabilia cards, contact the frame maker for custom depth options. 4. SGC's Custom Inserts Are Unique SGC cuts its slab inserts individually for each card submitted, which helps accommodate oddball card sizes that other grading companies struggle with. This custom approach affects the slab footprint slightly—another reason to verify compatibility with your chosen display product. Why BGS Slabs Are the Biggest Compatibility Challenge BGS slabs are the thickest of the major grading companies (8.5–9mm). This makes them the most challenging to fit into display products designed around PSA's more common 5–6mm standard. What this means for collectors: Some frames marketed as "graded card frames" may not fit BGS Storage boxes designed for PSA may be too shallow Multi-slab frames may need to be ordered specifically for BGS If you collect primarily BGS-graded cards, always check compatibility before purchasing display products. Many retailers now offer specific "BGS" frame options for this reason. Final Thoughts PSA, BGS, and SGC don't use the same slab dimensions—and that's a detail that can ruin a carefully planned display. BGS slabs are the thickest and can be problematic for frames and storage designed with PSA as the standard. SGC slabs are more compact but may not fit frames designed only for PSA. The best approach: know your slab thickness before you buy. Look for display products that explicitly list compatibility, offer adjustable designs, or let you select your grading company when ordering. Display the right way—the first time. Looking for graded card display ideas? Check out our guides on wall-mounted display cases, UV protection, and game room setup ideas.