Hi. It can vary depending on what you need to do. For the 35mm hinges Iâ€™d go for 23mm from edge to centre of hole. Unless you have a really odd situation I suspect thatâ€™ll work. I donâ€™t remember the figure for the other size hinges off the top of my head. Sorry.
Most manufacturers have a data sheet, which is probably on their website. I have an old woodfit (google them) catalogue which has all the measurements in, and which I refer to when necessary.
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