As the mirror is fragile, the carton mainly is foam-proof.
The glass is mainly broken due to uneven force. You can use Poly Dragon (that is, the foam we usually call) to separate the glass one by one. Pay special attention to the glass close to the Poly Dragon, so the Poly Dragon should have a circle. Grooved to put glass. Or you can use a thinner Poly Dragon or cardboard (carton paper) to pad in the middle, not too thick, or the glass will hang in the air, causing uneven force and broken.
Also indicate on the outer box: fragile items, do not press the words, the color is usually eye-catching red.
Below is our normal packaging of mirror for your reference
As a professional mirror manufacturer, we can also customize the color box packaging according to your requirements.