Tailor - I am fat, short and want to wear jeans. I go the length ok, but I need a few inches added?

I don't understand why you preface your question with "tailor". Only one celebrity ever had tailored jeans, and he preferred off-the-shelf. The way you do it is you buy a bigger size. Sometimes when you get the waist big enough the legs are too long and then you roll up the cuffs.