How do you actually visualize measurements like this?

I keep seeing dimensions online when shopping or planning stuff, but I honestly struggle to picture them in real life. Like when someone says a space is 20 feet, I just can’t imagine how big that really is without measuring it out myself. I recently came across something explaining how far is 20 feet visually, but I’m still a bit unsure if I’m thinking about it the right way. Do you guys have any simple tricks to visualize distances without pulling out a tape every time?