Frequently Asked Questions - craterdog/java-primitive-types GitHub Wiki

How do I know how big to make my tags?

The following table captures a range of scope sizes and the number of things within each scope that can relatively safely be identified with tags of a specific size without risk of repeated tag values:

Scope	# Things	# Bytes	# Bits	# Characters	Total # Tags
Desk	16	1	8	2	256
Room	256	2	16	4	65536
Building	65536	4	32	7	4.29E+009
City	4.29E+009	8	64	13	1.84E+019
Globe	1.84E+019	16	128	26	3.40E+038
Galaxy	3.40E+038	32	256	52	1.16E+077
Universe	1.16E+077	64	512	103	1.34E+154
Multiverse	1.34E+154	128	1024	205	1.80E+308

Use this table to chose the size of the tag that fits the scope of your thing space.