I wouldn't worry about the size; unless you have disproportionately long legs this will fit you a treat, and at that size there won't be a great deal of competition.
While I'm here, I hope I won't be treading on anyone's toes in bidding for that British Eagle in Southwell - it's my size, I'll be passing through Southwell tomorrow by car (convenient for collecting it), and I like the look of it! With a small collection of steel framed bikes (nowhere near some of you on here; I was trying to build up a stable of vintage bikes for a dream of a gite in the Pays de la Loire, but Brexit put paid to that), I really don't need another one, but it looks too good to let go for a pittance. Without a radical redesign of storage in the outhouses, I may need to let one go - anyone up for a 21 1/2" Holdsworth? (An impulse purchase from a yard sale in Burton Joyce - marginally too small for me, but I love it).