Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Mirage Pet Products Plain Leather Orange Dog Collar
Product description: A plain durable leather collar - add your own embellishments or enjoy it plain! Made in the U.S.A. Genuine leather.
Product feature: Made in the U.S.A, Genuine leather, Nickel-plated hardware and D-ring
Product price: $10.90
Product brand: Mirage Pet Products
Target attributes: Size
Answer: attribute: size
value: None
source: None