Yes, base 10.
mm, cm, dm, m, km…
If you want more details (if this is for a software / construction), maybe a go to:
Ikea may also be a good idea (exists throughout of Europa).
You may find house woods for roof, kitchen, etc. Not knowing what you want to achieve does not allow me to give more precise data, but you get the idea to where to search them.
UK country URL ending usually is
Each country have its own form factor;
220 V in the continental Europa (afaik) and 240 V for U.K. (50 / 60 Hz) instead of 110 V (USA).
Nota: the Apple poser adapters sold in Europa are auto set up (unlike the one in the USA where they are 110 V/ Hz ?).
Internet is also your best friend for that too (more or less).