We made this element a couple of weeks ago. 5m (about 20-ft) at heighest point coming down to 1m (3-ft) off the ground. 19.5m (64-ft) total length for a tune at 3.7MHz with more than 200kHz bandwidth. If you want say 3.8MHz and above in USA (say), aim for 61-ft. Deploy and test! Callum.