Topband: Tee Antenna dimensioning

[Peter Bacon]

Advise please on the formula to calculate the lengths of the horizontal
elements for a 160m Tee antenna.  Currently I have a 60 foot vertical wire
suspended between the trees, with a long horizontal section making an
inverted L, but want to change it to a Tee.  I am looking to resonate the
antenna around 1.9 MHz and then bring it down with a hairpin match.
Thanks Peter G3ZSS