A 3.5-inch tall vacuum fits under most couches and coffee tables

At 3.5 inches tall, this vacuum slides under couches, coffee tables, and low entertainment centers. That’s about standard for a robot vacuum — most fall between 3.4 and 3.8 inches. The important number isn’t the vacuum’s height though, it’s the clearance of your furniture. If your couch has 4 inches of ground clearance, a 3.5-inch robot will fit. If it’s 3 inches, you need a slim model like the Eufy RoboVac 11S Max. Always measure your lowest furniture before buying — that’s the real variable.