Instead of selling standard sizes I've found it easier to take your dog's measurements and make the item based on that.

When measuring your dog, use a flexible sewing type tape measure, not the stiff construction type. If you don't have a flexible tape measure, use a string, then measure the string.

The measurements I use are:

• Back length - from base of neck to base of tail (yellow line)
• Chest - measure around largest part of chest (aqua line)
• Leg length for sweatshirts or playsuits - measure front leg from arm pit to ground. (red line)