Sterling: 

Width Ladies Men
(mm) Rose/Yellow
Gold
White Gold/
Platinum
Rose/Yellow
Gold
White Gold/
Platinum
3 £750 £760 £855 £870
3.5 £845 £855 £970 £985
4 £940 £950 £1,080 £1,100
4.5 £1,035 £1,045 £1,195 £1,215
5 £1,125 £1,140 £1,305 £1,330
5.5 £1,220 £1,235 £1,415 £1,445
6 £1,315 £1,330 £1,530 £1,560
6.5 £1,410 £1,425 £1,640 £1,675
7 £1,505 £1,520 £1,755 £1,790
7.5 £1,600 £1,620 £1,865 £1,905
8 £1,690 £1,715 £1,975 £2,020
10 £2,070 £2,095 £2,425 £2,475

Euro:

Width Ladies Men
(mm) Rose/Yellow
Gold
White Gold/
Platinum
Rose/Yellow
Gold
White Gold/
Platinum
3 € 860 € 870 € 980 € 1,000
3.5 € 970 € 980 € 1,120 € 1,130
4 € 1,080 € 1,090 € 1,240 € 1,270
4.5 € 1,190 € 1,200 € 1,370 € 1,400
5 € 1,290 € 1,310 € 1,500 € 1,530
5.5 € 1,400 € 1,420 € 1,630 € 1,660
6 € 1,510 € 1,530 € 1,760 € 1,790
6.5 € 1,620 € 1,640 € 1,890 € 1,930
7 € 1,730 € 1,750 € 2,020 € 2,060
7.5 € 1,840 € 1,860 € 2,140 € 2,190
8 € 1,940 € 1,970 € 2,270 € 2,320
10 € 2,380 € 2,410 € 2,790 € 2,850