With “Creme stripes” pet sweater pattern you can crochet cozy sweater for dog or cat. Pattern provides instructions for S and M size (specific measurements is provided below). Pattern contains many photos (41) and also links to my youtube video tips.
Pattern is provided 2 versions: US and UK/EU terminology.

S size

Length from neck to tail 22cm / 8⅝in
Chest circumference 29 - 31cm / 11⅜ - 12⅛in
Neck circumference 20 - 22cm / 7¾ - 8⅝in
Front leg circumference 11 - 12cm / 4¼ - 4⅝in
Length of abdomen 8cm / 3⅛in
Abdomen circumference 35 - 37cm / 13¾ – 14½in
Width between front legs 5cm / 1⅞in

M size

Length from neck to tail 28cm / 11in
Chest circumference 35 - 37cm / 13¾ - 14½in
Neck circumference 25 - 27cm / 9¾ - 10⅝in
Front leg circumference 13 - 14cm / 5 - 5½in
Length of abdomen 10cm / 3⅞in
Abdomen circumference 39 – 41cm / 15¼ – 16⅛in
Width between front legs 6cm / 2¼in

Weight:
S size
52 g / 1.84 oz (125 m / 136.7 y)
Beige 32 g / 1.13 oz (77 m / 84.2 y)
White 20 g / 0.71 oz (48 m / 52.5 y)

M size
74 g / 2.6 oz (178 m / 194.7 y)
Beige 46 g / 1.6 oz ( 111 m / 121.4 y)
White 28 g / 1 oz ( 67 m / 73.3 y)

Type:
UK: DK weight
US: Light worsted/DK
AUS: 8-ply

Other:
4mm (G6) hook, yarn needle, 2 yarn
markers