Over-estimate the size of your darling’s diamond digit and she’ll be stuck with a loose-fitting hula-hoop of love. Underestimate it and the symbol of your undying passion will be the blood flow-restricting bane of her life. But how does a chap find out the answer to this particular problem without having his romantic plans busted? Chillisauce comes to the rescue with this handy guide, which may or may not involved stealing, lying, conspiracy and subterfuge.