When trying to find the center on rectangular, square or even round objects it can sometimes be challenging at best. While you could always measure
Cuff Wide Metal Tailor Ruler - WAWAK Sewing Supplies
SE 12 Stainless Steel Ruler - 9212SRP - Construction Rulers
12 Inches/30cm Acrylic Clear T-Square Ruler, Inches and Metric, T Square Ruler, Transparent, T Ruler, for Crafting Drafting and General Layout Work Art Framing & Drafting Scrapbooking Crafting : Arts, Crafts
12 inch Stainless Steel Center Finding Ruler Finds Exact Center Between Two Points, Ideal for Woodworking, Metal Work, Crafting, Drawing, Scrap
Straightedge Ruler
Stainless Steel Machinist Goniometer
Stainless Steel T Type Hole Ruler Scribing Gauge Woodworking
Big Horn 19587 12-Inch Precision 16R Rigid Stainless-Steel Ruler - (1/50 Inch, 1/100 Inch, 1/32 Inch, 1/64 Inch)
Easy Read Stainless Steel Ruler, Standard/Metric, 18.25 Long