Introduction
One of the most common questions we receive from customers is: "What thickness of acrylic should I use?" The answer depends on the size of your project, how it will be used, whether it needs to be rigid or flexible, and your budget.
This guide breaks down the most common acrylic thicknesses and explains which applications each is best suited for, so you can make the right choice before placing your order.
Common Acrylic Thicknesses and Their Uses
1.5mm — Thin & Lightweight
The thinnest commonly used acrylic sheet. It's lightweight and flexible, making it suitable for small decorative items and applications where rigidity isn't critical.
- Small keychains and charms
- Thin decorative overlays
- Lightweight cake toppers
- Small tags and labels
Note: Not recommended for large pieces — it can flex or warp under its own weight.
2mm — Light Duty
Slightly more rigid than 1.5mm, still lightweight. Good for small to medium decorative applications.
- Keychains and bag tags
- Small signs and labels
- Craft projects and hobby use
- Small photo frames
3mm — The Most Popular Choice
3mm is by far the most commonly ordered thickness for custom acrylic products. It strikes the ideal balance between rigidity, weight, and cost. It's rigid enough for most signage and display applications while remaining lightweight and easy to handle.
- Logo signs and wall-mounted displays
- Retail shelf signs and price tags
- Event and wedding signage
- Product display stands
- Awards and plaques (small to medium)
- Decorative panels
Recommended for: Most standard signage and display projects up to approximately 60cm x 60cm.
5mm — Medium Duty
5mm acrylic is noticeably more rigid and substantial than 3mm. It's the right choice when you need a more premium, weighty feel or when the piece is larger and needs to hold its shape without bending.
- Large wall signs and lobby displays
- Freestanding display panels
- Premium awards and trophies
- Furniture components (shelves, dividers)
- Large retail displays
Recommended for: Pieces larger than 60cm x 60cm, or any application where a premium, substantial feel is important.
8mm — Heavy Duty
8mm acrylic is thick, rigid, and heavy. It's used for applications that require structural strength or a very premium, glass-like appearance.
- Large lobby signs and reception displays
- Architectural elements and partitions
- High-end awards and corporate gifts
- Thick display blocks and pedestals
- Safety barriers and protective screens
10mm and Above — Structural & Specialty
Acrylic at 10mm and above is used for structural applications, aquariums, machine guards, and specialty display cases. It's heavy and expensive, but provides maximum rigidity and a truly glass-like appearance.
Quick Reference Guide
| Thickness | Best For | Max Recommended Size |
|---|---|---|
| 1.5mm | Keychains, small decorations | Up to 15cm x 15cm |
| 2mm | Small signs, craft projects | Up to 30cm x 30cm |
| 3mm | Standard signage, displays, events | Up to 60cm x 60cm |
| 5mm | Large signs, premium displays | Up to 120cm x 120cm |
| 8mm | Lobby signs, structural elements | Up to 200cm x 100cm |
| 10mm+ | Structural, specialty applications | Custom |
Other Factors to Consider
Clear vs. Colored Acrylic
Thickness choice can also depend on the color of acrylic you're using. Colored and mirrored acrylic sheets are often available in a slightly different range of thicknesses than clear acrylic — check with your manufacturer for availability.
Mounting Method
If your sign will be wall-mounted with standoffs (metal spacers), 3mm or 5mm is typically recommended for a clean, professional look. Thinner acrylic can flex between mounting points on larger pieces.
Budget
Thicker acrylic costs more per sheet and weighs more (higher shipping cost). For most standard signage applications, 3mm offers the best value without compromising quality.
Not Sure Which Thickness to Choose?
At artetribe, our team is happy to recommend the right thickness for your specific project. Just tell us the size, intended use, and mounting method, and we'll advise you on the best option.
💬 Contact our team for a free consultation and quote — we respond within 24 hours!