International Standard Size
ISO Standard
IEEE Standard
IEC Standard
SAE Standard
National Standard Size
American Standard
British Standard
German Standard
Chinese Standard
Japanese Standard
About Standard Size
Breakdown of standard sizes across various common categories.
1. Standard paper size.
The most recognized global standard is the ISO 216 "A Series", used everywhere except North America.
A3 (297 x 420 mm): Twice the size of A4, often used for presentations and diagrams.
A4 (210 x 297 mm / 8.27" x 11.69"): The international standard for business documents, letters, and printers.
A5 (148 x 210 mm): Half the size of A4, common for notepads and journals.
2. Standard clothing size.
This is one of the most variable categories. Sizes are not standardized between brands or even countries.
US Women's: Typically even numbers (0, 2, 4, 6, ... , 16, 18, etc.)
US Men's: Based on chest/bust measurement (e.g., Size 40 suit).
EU: Uses a number based on a formula (e.g., EUR 36, 38, 40, etc.).
UK: Uses even numbers similar to the US but with different measurements (e.g., UK 8, 10, 12).
3. Standard shipping box size.
Companies like U-Haul, FedEx, and Home Depot offer "standard" moving or shipping boxes. Common ones include:
Small: 16" x 12" x 12" - For books, heavy small items.
Medium: 18" x 18" x 16" - The most common, for pots, pans, toys.
Large: 24" x 18" x 24" - For lightweight bulky items like pillows, lampshades.
4. Standard tire size.
Companies like U-Haul, FedEx, and Home Depot offer "standard" moving or shipping boxes. Common ones include:
Small: 16" x 12" x 12" - For books, heavy small items.
Medium: 18" x 18" x 16" - The most common, for pots, pans, toys.
Large: 24" x 18" x 24" - For lightweight bulky items like pillows, lampshades.
Tire sizes follow a standardized alphanumeric code on the sidewall. For example: P215/65R15 95H