Set size has more bearing on day-to-day use than style alone. The best rustic garden furniture sets are the ones that fit your patio comfortably while leaving enough room to move around, pull chairs out and open doors or bifolds without everything feeling cramped.
For smaller UK gardens, companion sets, benches and two-seat bistro layouts usually make better use of space than full dining arrangements. If you host often, an extending table or folding chairs can be more practical than giving over the patio permanently to a large six-seat set.
It is also worth matching the set to how you actually use the space, since morning coffee, casual drinks and family meals all call for different footprints. A compact set often feels neater and easier to live with than a larger one that only earns its keep a handful of times each summer.