ᐅ What is a standard outdoor water connection?

We have a standard outdoor faucet. Now I want to buy a hose that is offered at the local discount store. Is it likely 3/4 inch or 1/2 inch? What is the common size? Of course, I could also call the plumber, but they might be annoyed.

You could simply measure instead?

One might boldly hold a ruler up to the connection now...

Ok. So, 1.9 cm (0.75 inches) or 1.27 cm (0.5 inches). Inner diameter?

Um, yes. Inches to centimeters... doable task.

I know. But the construction site is 14 km (9 miles) away. The quote states "exterior wall valve Eurotec DN 15." That doesn’t help me either.