Ante meridiem is commonly denoted as AM, am, a.m. or A.M. while post meridiem is usually abbreviated to PM, pm, p.m. or P.M. Each hour during the day, except midnight and noon, is suffixed by am or pm to identify whether the hour being referred to is in the morning, afternoon or evening.
Answer: The most common height for a bar top, whether it is a kitchen breakfast bar, a basement wet bar, or your commercial bar down at the corner pub is 42-inches. Standard conventions support the 42-inch bar height. Most premade back splashes are 4 to 6-inches tall.
(Cabinet and Millwork Installation Forum) From contributor M: 42 AFF for bar height. Typically, what I have seen and done in a commercial situation, is no less than 16 and no more than 18, depending exactly on the configuration. We almost always go 18, plus, if they want, a 4 wide drink rail mounted below it on working side.