up to 7lb

(up to 3.1kg)

7 - 15lb

(3.1 - 7kg)

15 - 20lb

(7 - 9kg)

20 - 25lb

(9 - 11kg)

25 - 28lb

(11 - 13kg)

28 - 32lb

(13 - 14.5kg)

28 - 32lb

(13 - 14.5kg)

32 - 35lb

(14.5 - 16kg)

35 - 40lb

(15.9 - 18.1kg)

39 - 42lb

(17.7 - 19.1kg)

up to 20in

(up to 50.8cm)

21 - 24in

(53.3 - 61cm)

25 - 27in

(63.5 - 68.6cm)

28 - 31in

(71.1 - 78.7cm)

31 - 33in

(78.5 - 84cm)

33 - 35in

(84 - 88.9cm)

35in

(88.9cm)

38in

(96.5cm)

41in

(104.1cm)

44in

(111.8cm)

3.5in

(8.9cm)

4.5in

(11.4cm)

5in

(12.7cm)

5.75in

(14.6cm)

6.5in

(16.5cm)

3in

(7.6cm)

3.5in

(8.9cm)

4in

(10.2cm)

4.5in

(11.4cm)

5in

(12.7cm)

15 - 16.5in

(38.1 - 41.9cm)

16.5 - 17.5in

(41.9 - 44.5cm)

17.5 - 18.5in

(44.5 - 47cm)

18.5 - 20in

(47 - 51cm)

20 - 21in

(51 - 53.3cm)