Combination imperial/metric rules and tape measures (as illustrated above) are very common in the UK.
Most new stuff is dimensioned in metric, but there are a LOT of older buildings, woodwork, and other manufactured articles still around that were designed and built in imperial length units.
We ‘converted to metric units’ by Act of Parliament in 1968 - but far from completely. Road distances are still measured in miles, signs for the distance to the next motorway exit are in yards, and although timber is now sold in ‘metric’ sizes the old ‘imperial’ units are still used to describe it - wood called 2x1 was 2in x 1in sawn, and the planed all round (PAR) finished size is about 1 3/4in x 7/8in, or 44 x 22mm, often sold as 50x25mm nominal.
I do a lot of work on scenery at our local amateur theatre, www.abbeytheatre.org.uk, and because much of our scenery is very old (not even new when I joined in 1970) we still build most new scenery to fit the old flats and rostra which are typically dimensioned as a whole number of feet (or a multiple of 6inches) - hence almost all our tape measures in the theatre workshop are dual units - metric AND imperial on one tape.
You can buy ‘pure’ metric or (less commonly now) ‘pure’ imperial rulers and tape measures of course. Most builders and the whole construction industry now use metric dimensions for new buildings, but might need to match older imperial dimensions if doing restorations of old buildings.