ISO

Database ISO Codes

ISO 639 - Language Codes https://www.iso.org/iso-639-language-codes.html

ISO 3166 - Country Codes http://www.iso.org/iso/home/standards/country_codes.htm

ISO 4217 - Currency Codes http://www.iso.org/iso/home/standards/currency_codes.htm

ISO 6346:2022 - Freight containers https://www.iso.org/obp/ui/en/#iso:std:iso:6346:ed-4:v2:en

Length	Height	Characteristics
4	5	G1

Length	Height	Type
2 - 20 Feet	2 - 8 Feet 6 Inches	G1 - General Purpose Container
4 - 40 Feet	5 - 9 Feet 6 Inches "High Cube"	R1 - Refrigerated Container
5 - 45 Feet		U1 - Open Top Container
M - 48 Feet		P1 - Platform Container
		T1 - Tank Container

References

https://www.bic-code.org/size-type-code/