This product is designed for small dogs and cats! S-size, L-size is only the size of the standard, not a small dog and a large dog yo! The Kiss the best to buy the first baby before measuring the neck to the neck circumference to purchase the corresponding size yo, weight can not be used as the basis for the election code Oh. Hair fluffy dog do not measure the hair when yo, the product size for manual measurement, which is about 1cm deviation, are within the normal range, mind carefully shot!