Well Avarage humman hight is 5 ft 7.73 in or 172.04 cm and people would use a 28" to bout 40" sword depends on what you do me i use a 62" sword or my most faverite my Paul Chen Folded Steel Tori Katarna its little but its nice light and fast and got good vibe but you might thing how is that possible to draw that out single handed well that cause my high is not of what you say as above average hight my high is not Above average hight my hight would be considered ABOVE ABOVE average
i am currently standing at 7 ft 2.24 or in metric 219.45cm well over 2 meters tall and with this my arm is pretty long i can easily draw out this katarna if you can call it that with one arm cause i have long arms i can get a fair distance away but it is hard to find a good sword for my hight i got my 62" sword made for me (at large cost) didnt think it would fit in kyln but its all good and s a very light 2.4 kg (light for size) and easyily drawn at fast speed and sheathed at speed but it is very smooth and yeah