This is a long coat by Baby the Stars Shine Bright! It was released in 2009. I included a stock photo of it in the pink colorway for reference.
The coat is black x white and includes a detachable faux-ur collar, removable back bow, a bustled back, and tie-able neck ribbon. It's extremely warm as it's made of wool, and great for winter!

Measurements from Lolibrary:

• Bust: 96 cm
• Length: 92 cm
• Waist: 86 cm
• Sleeve Length: 62 cm
• Shoulder Width: 36cm and under