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Sizes and Usage Recommendations- Signs

This article provides information on sign and frame compatibility

Choosing the right combo comes down to three things: material, size/orientation, and grommet holes.

Material → Hardware Basics

  • H-stakes: Corrugated Plastic (4mm) only. The stake tines slide into the corrugation; other materials won’t work.

    • Not recommended for hanging signs. Corrugated panels can flex/tear at grommets when suspended.

  • Metal frames / posts (colonial, cross-arm, A-frame holders, angle-iron stakes): Use Polycomb, Aluminum Composite, or Reflective Aluminum Composite as long as the panel size/orientation matches the frame and the required grommet holes are present.

When You Need Grommet Holes

  • Required for: Colonial posts, cross-arm posts, A-frame holders, and angle-iron stakes (these hang the panel from hardware).

  • Not required for: H-stakes (corrugated plastic) and slip-in frames that capture the panel edges.

  • Typical placement (unless your hardware specifies otherwise): Top grommets 16" on center; add top & bottom if you’re linking a rider or need extra stability.

Size & Orientation Must Match

  • Your panel width/height and portrait/landscape orientation must match the frame or post system you’re using. If the hole spacing or panel size is off, it won’t hang flat.

Quick Size Guide (Common Markful Hardware)

  • Colonial Post: Fits panels up to 30" L × 24" W (max panel outside dimensions).

  • 52" Cross-Arm Post: Fits panels up to 24" × 24".
    Tip: If you’re close to the max, choose top & bottom grommets for stability outdoors.

Durability Notes

  • Corrugated Plastic (4mm): Best for temporary use (open houses, short-term promos). Not meant for long-term exposure to sun/wind/rain and not recommended for hanging applications.

  • Polycomb / Aluminum Composite / Reflective Aluminum Composite: Better for longer-term outdoor use and any hanging setup.

Fast Compatibility Matrix

  • Corrugated Plastic (4mm): H-stakes ✅ | Hanging hardware (colonial/cross-arm/A-frame/angle-iron) ❌ not recommended

  • Polycomb (3mm): Slip-in frames ✅ | Hanging hardware ✅ (with grommets)

  • Aluminum Composite (3mm): Slip-in frames ✅ | Hanging hardware ✅ (with grommets)

  • Reflective Aluminum Composite (3mm): Same as Aluminum Composite ✅