Acrylic Thickness Guide: Which Thickness Should You Use?
CMBACRYLIC
Beginners Guide
Beginners Guide · Thickness
Acrylic Thickness Guide: Which Thickness Should You Use?
1/16"? 1/8"? 1/4"? If you've ever stared at a thickness dropdown and just guessed, this is the guide that finally makes the decision easy.
Thickness is one of those decisions that seems small until it isn't. Too thin, and your earrings flex and snap. Too thick, and your keychains feel like paperweights—or your shipping costs quietly eat your margin.
The good news: once you know what each thickness is actually good for, choosing gets fast. Here's the breakdown.
Quick answer: Use 1/16"–1/8" for earrings, keychains, and small flat accessories. Use 1/8"–3/16" for cake toppers, ornaments, and most small signage. Use 1/4" for freestanding signs, shelf displays, and anything that needs to hold its own weight. Use 1/32" flex acrylic for anything that needs to bend or wrap.
The lineup
Common Acrylic Thicknesses, Explained
These are the thicknesses you'll see most often—and what each one is actually built for.
Ultra-thin
1/32" Flex Acrylic
Thin enough to flex and curve without cracking. Used for acrylic shaker ornaments, see-through paneling on 3D-printed organizers, and anything else that needs to bend or curve rather than stay rigid.
Shop 1/32" & Flex →
Thin
1/16" Acrylic
Lightweight and affordable. The go-to for earrings, small keychains, and bag tags—anything where you want the piece to feel delicate rather than heavy in the hand.
Shop 1/16" →
The all-rounder
1/8" Acrylic
The most popular thickness for a reason—sturdy enough to hold up on its own, still light enough to ship affordably. This is the default for cake toppers, keychains, ornaments, and most small-to-medium signage.
Shop 1/8" →
A step up
3/16" Acrylic
Noticeably more substantial than 1/8" without the weight of 1/4". A good middle ground for table numbers, medium signage, and layered pieces where you want extra presence.
Shop 3/16" →
Built to stand
1/4" Acrylic
Thick enough to be freestanding and structural. This is what you want for shelf displays, freestanding signs, and anything that needs to hold its shape without a stand or backing.
Shop 1/4" →Choosing by project
What Thickness Should You Use For…?
If you already know what you're making, this is the fastest way to decide.
| Project | Recommended thickness |
|---|---|
| Earrings | 1/16"–1/8" |
| Keychains & bag tags | 1/8" |
| Cake toppers | 1/8"–3/16" |
| Ornaments | 1/8" |
| Table numbers & place cards | 1/8"–3/16" |
| Wall-mounted signs | 1/8"–1/4" |
| Freestanding signs & shelf displays | 1/4" |
| Coasters | 1/8"–1/4" |
| Shaker ornaments | 1/32" Flex |
| See-through paneling on 3D-printed organizers | 1/32" Flex |
| Layered/dimensional signs (top layer) | 1/8" |
Beyond the basics
Other Things Thickness Affects
Engraving Depth
Thicker material gives your laser more room to work with, which matters for deep or multi-pass engraving. On thinner sheets, an aggressive engrave setting can weaken or warp the piece. If your design relies on visible depth, size up.
Weight & Shipping
Thickness adds up fast when you're shipping in bulk. A stack of 1/4" sheets weighs meaningfully more than the same stack in 1/8"—worth factoring in if shipping cost is part of your pricing math.
Cast Thickness Variation
Because cast acrylic is poured rather than extruded, thickness can vary very slightly sheet to sheet—normal, and part of what gives cast acrylic its better cutting and engraving performance.
Read more in Types of Acrylic Explained.
Cost Per Piece
Thicker sheets cost more per square foot. If a project doesn't structurally need 1/4", stepping down to 1/8" or 3/16" can meaningfully improve your margin without changing how the finished piece looks.
When in doubt, go with 1/8". It's the most versatile thickness in the lineup—sturdy enough for most projects, affordable enough to not think twice about, and the safest default if you're building a new product and aren't sure yet.
Final thoughts
Final Thoughts
Thickness isn't just a spec on a product page—it changes how a piece feels in the hand, how it holds up over time, and what it costs you to make and ship.
Once you've matched a few projects to the right thickness, choosing stops being a guess and starts being second nature. If you're still narrowing down finish or color on top of thickness, Choosing the Right Acrylic for Your Project is a good next stop.
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Find your thickness
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