No, the Thule Gauntlet 3.0 15 MacBook Pro Sleeve is designed specifically for a 15-inch Macbook Pro laptop and will not fit other sizes:
• It features an extra-padded interior to provide superior cushioning and protection for your device.
• The exterior is water repellent to keep moisture away from your laptop.
• An adjustable strap allows you to customize the fit of the sleeve on your laptop.
Therefore, it can only accommodate laptops with similar dimensions as a 15" Macbook Pro - any other size would be unable to fit in this protective case.