Depends on the width and offset and the tyres. I think anything over 15" look ridiculous.
There is a blue K11 with 16" alloys from a K12, they look OK since they're OEM but no my taste at all.
Here's a K11 with 16's from a Scenic
And here's how cack 17's look on a small car. Your typical 106, Saxo, Max Power knob goblet lover would need a box Kleenex. Most people would need a weigh bridge.