"Visual bulk" refers to the perception or appearance of a large or bulky size when looking at something.
Sentences with «visual bulk»
The knit material of these blazers is on the thicker side anyway, so extra fabric around the middle definitely adds visual bulk. (bluecollarredlipstick.com)
The rear does not change dramatically over the outgoing model, but there is clearly a lot less visual bulk than the older version. (auto.ndtv.com)
BMW says it's all aimed at reducing visual bulk. (autoweek.com)