Placement of your TV relative to your furniture, speakers, etc. is crucial to the overall design aesthetic. If your TV will be mounted above a cabinet with nothing on top of it, we typically recommend the bottom of the TV be no less than two inches and no more than six inches from the top of the cabinet. The latter, six inches, should only be with very large TVs and/or very tall ceilings. If there will be a speaker or some sort of decoration on top of the table, we typically error on the side of less space from the top of whatever that is to the bottom of the TV rather than more. This job was particularly interesting because we were dealing with a curved TV mounted above a soundbar with the added design challenge of incorporating the existing chair rail on the wall. In the end, we decided to marry the bottom of the soundbar with the top of the chair rail. From that decision, we could determine the top of the soundbar and place the TV wall bracket in such a way that there would be a 1-2 inch gap between the bottom of the TV and the wall mounted soundbar. Note that your TV mount comes in two parts. One part attaches to the wall, the other part is usually two arms that connect to the TV. The two parts essentially hook together for an easy hanging installation. Its important to measure according to where the hooking will take place (rather than the outside edge of the TV per se) in order to achieve proper spacing.