Have a look for a sewn in tag, might be where the awning slides in the rail on the van, should have the size printed on, or measure the part that slides in the awning rail from end to end,
As the above post mentions, it doesn't matter what make of caravan or awning it is as long as the awning rail measurement on the caravan and the awning beading measurement match.
Amazing family weekend with old steam engines, classic car displays, market stalls, and full catering and bar. And camping on site - Save £25 by booking in advance.