What does this number measure?
A light frame that extends the movement of the arm. The stated length is that of a common-sized racket, from the handle to the top of the frame. Dimensions and masses vary with models and players.
Compare the stated dimensions
The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.
Source and limitations
Catalogue order of magnitude; a source is provided, but this measurement has not been individually audited.
Complete tennis racket, vertical length.
Model not specified: Varies by period. Proposed historical date; an existing documentary source is linked but was not consulted for this date in this session. Do not interpret this reference as the manufacturing date of the illustrated specimen. Generic racket; construction and materials have changed over time, with no model identified. A universal year would be misleading.