The dog sweater described in your message is made of elastic wool and comes in three different color combinations: Red&White Stripe, Black&White Stripe, and Brown&White Stripe. The sweater is available in various sizes, each with its corresponding measurements.
Here is the size chart provided:
XS:

Neckline: 22 cm/8.66 inch
Chest: 32 cm/12.6 inch
Back Length: 19.5 cm/7.5"
S:
Neckline: 26 cm/10.24 inch
Chest: 36 cm/14.17 inch
Back Length: 28 cm/11.02 inch
M:
Neckline: 28 cm/11.02 inch
Chest: 42 cm/16.54 inch
Back Length: 32 cm/12.6 inch
L:
Neckline: Approx. 12.6 inch/32 cm
Chest: Approx. 17.3 inch/44 cm
Back Length (include collar): Approx. 14.15 inch/35 cm
XL:
Neckline: Approx. 15 inch/38 cm
Chest: Approx. 21-25 inch/54 cm-63 cm
Back Length (include collar): 41 cm/16 inch
XXL:
Neckline: Approx. 48.5 cm/19 inch
Chest: Approx. 25-29 inch/63.5-73.5 cm
Back Length (include collar): 51 cm/20 inch
Some customer reviews have mentioned that the sweater runs small. To address this concern, the manufacturer has upgraded the material to elastic wool to provide a better fit. It is advised to review the size chart carefully and select the size that best suits your pet's body size to ensure a proper fit.