I'm 5ft., 3 in. DH is 5ft., 10in. DH's mum, however, is 5ft., 11in., same height as his dad, and DH's brother is 6ft., 5in.
Our eldest is extremely tall and thin, the middle one is average height and our son is also extremely tall.
Will be interesting to see how they turn out, too!
My sister is 5ft., 1in and her husband is 6ft., 5in. and her daughters are probably fully grown now. The 15-year-old is 6ft., 1in. and the 13-year-old is 5ft., 9in.