Girth size Approx height
8-10cm girth = 7-9ft
10-12cm girth = 9-11ft
12-14cm girth = 11-13ft
14-16cm girth = 13-15ft
16-18cm girth = 15-17ft
18-20cm girth = 17-19ft
20-25cm girth = 19-21ft
25-30cm girth = 20ft+
30-35cm girth = 25ft+
35-40cm girth = 25-30ft
40-60cm girth = 25-35ft