An arm support for blood pressure monitoring, including an adjustable-height stand with a number of legs that support an upwardly-extending post. An arm-supporting saddle is fixed in position at the top of the post. The saddle has an upper arm-support surface that is configured to support an arm of a user. The top of the post is adjustable in height relative to the legs, to allow the saddle to be positioned at an appropriate height such that the user's arm when supported by the saddle is in a horizontal position.