The Gimlet is classically equal parts gin and lime cordial, stirred in the glass it is to be served in, with added ice being optional (but optimal). This...
Yeah, the original was equal parts. In this rendition, I prefer it as a 1:1.5 part cocktail. I do 30ml lime cordial, 45ml gin, stirred and served straight up. This proportion apparently comes from the back label of the bottle of Rose's Lime Juice.