Hello @thesteemhouse
that would be a bit difficult to price really. it may be easier to work the other way round, if you had a budget and wanted 5 i could show you some designs that would be possible.
As an idea, this piece sold for £140 so current price 105 STEEM. A relatively simple design of 5 items would probably be in the region of £50 each so about 190 steem. im on discord @robali123 if you want to chat a bit more about it. sorry to be so vague its a difficult one to price custom jewellery without knowing your needs.