| credit card | 3⅜ × 2⅛", 30 thou thick | 85.60 × 53.98 mm |
| US dollar bills | 6.14 × 2.61" | 156 × 66.3 mm |
| US quarter | 0.955" diameter, 68.9 thou thick | 24.26 mm diameter, 1.75 mm thick |
| US nickel | 0.835" diameter, 76.8 thou thick | 21.2 mm diameter, 1.95 mm thick |
| US penny | 0.750" diameter, 61.0 thou thick | 1.55 mm thick |
| US dime | 0.705" diameter, 53.1 thou thick | 1.35 mm thick |
| Kwikset classic (5pin) | inter-pin distance: 0.15" (C2C), 0.75" total (C2C) | ... |
| blade width of an uncut key: 0.335" | ... |
| letter paper | 8½ × 11" | 215.9 × 279.4 mm |
| AC plug (NEMA 1) | distance between blades: 0.5" ID, 0.62" OD
blade thickness: 60 thou blade widths: 1/4" and 5/16" | |
| 3-prong AC (NEMA 5) | ground plug: 3/16" diameter | |
| USB connector (male, type A) | 0.6181 × 0.2952" | 15.7 × 7.5mm |