Hi Sherry – for height it will depend on whether this is more of a table where you do assembly work, or whether you use it for cutting, edging, carving etc. If for cutting etc you will want it at a height that is comfortable for you to have your work on and allow you to push down with your arms to apply pressure with your tools. Typically this means it will be slightly lower to give you leverage while working. If however it is more of an assembly table you will want it so that the top of the table top is at a height where your arms are at slightly more than a 90 degree bend. So maybe a 55 degree bend. This is more ergonomic for when you don’t need to apply force or use tools. Hope that helps!