D'Addario XSABR1047-12 10-47 Light 12-string XS 80/20 Bronze Coated Strings

Once they're on, they're great!

I hope these will be good replacement strings for the already-corroded ones that arrived on my new Epiphone? (I'm sure most customers would be glad to pay the £20 extra to avoid the disappointment when opening the guitar box for the first time? Funny the little things you remember about a brand - particularly when deciding which one to go for next time around. Owned by Gibson???????)
Immediate problem is... can I tell the difference between a listed brass-ended 0.58mm G-string and a brass-ended 0.69mm E-string? Or a silver-ended 0.30mm D-string from a silver-ended 0.25mm E-string? Proper colour-coding might have been useful - or tagging them or pairing off in some simple way? What, no micrometer provided?
The rating can only go up, after an hour of 'guess the string', but I'd rather be playing it than having to make it fit for purpose so early in the day. Off to find my very best specs...