At my job (project manager/technical assistant at a translation's beaurau)we basically have these:
Coffee break at 10AM and at 3PM. The morning one is usually 10 minutes, while the afternoon break is like 20-30 minutes (We Swedes love our coffee breaks)
Lunch break for an hour whenever (no scheduled time, but people usually take their break at 12-01).
Other than that, people are free to stretch their legs whenever there's nothing to do (since we work with client orders, there's nothing to do at times depending on number of orders and/or if the workflow is at your end currently or not, so perfect to stretch your legs and grab a tea or something).