IPA: /ʌnˈsaɪzd/
KK: /ʌnˈsaɪzd/
Not having a specific size or measurement.
The unsized fabric can be cut to fit any project.
Unsized → It is formed from "un-" (meaning not) and "sized" (from Old French *siser*, meaning to set or fix). The word "unsized" means not set or fixed in size.
Think of 'not' ('un-') having a specific 'size' — that's why unsized means something that does not have a defined size.