PCB Ruler, 6 Inch - ProtoSupplies

The PCB Ruler is 6 inches long.  It is made of .062" thick FR-4 and has various SMD footprints and wire gauge holes for quick reference.
Provides various SMD footprints, trace widths and wire gauge holes for quick reference.

Adafruit PCB Ruler v2 - 6 : ID 1554 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits

Standard 6 inch Ruler - CPS/Keystone

MakerFocus 2pcs PCB Ruler 6 Inch 15cm Measuring Tool for Soldering Up

The Ultimate PCB ruler from Sinzu Shop&Co on Tindie

Adafruit PCB Ruler v2 - 6 : ID 1554 : $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits

The Ultimate PCB ruler from Sinzu Shop&Co on Tindie

PCB Rulers – Bolt ⚡ Industries

PCB Ruler, SP-80003

The Ultimate PCB ruler from Sinzu Shop&Co on Tindie