Tennis Net (at Posts)
6′6″ (78 in / 198 cm)

Catalogue Ref. No. BL-001
Specimen
5′7″
“The Baseline”
A reference standard of sixty-seven inches,
preserved for comparative exhibition.
CLASS: REFERENCE
TYPE: BASELINE
67 IN / 170 CM
STATUS: PERMANENT
5′7″
baseline
6′6″
Tennis Net (at Posts)
That's 11 inches taller.
A regulation tennis net stands 42 inches at the posts (3 feet 6 inches at center). Wait — that is shorter. Stack two nets and you get 7 feet — finally taller at 6 feet 6 inches total.
Fun Fact
The net height at center court is exactly 3 feet, chosen in the 1880s. Two nets stacked at the posts would just clear Tom Cruise with 11 inches to spare.