It's dumb, but whenever I see something representing the planets, I always count them. Occasionally you come across places that still include Pluto.

Most recent example I found was the Swatch MoonSwatch Collection [1], which includes the Sun, Moon, eight planets and Pluto[2].

1. https://www.swatch.com/en-us/bioceramic-moonswatch-collectio...

2. https://www.swatch.com/en-us/mission-to-pluto-so33m101/SO33M...