If you are shipping an instrument without a case, wrap it at least three times with bubble wrap and secure the wrap with shipping tape. There should not be any edges sticking out. The instrument should be completely covered. Select a strong and sturdy double corrugated box that is at least 2-inches larger than your instrument in height and length.
If you are shipping inside a case, check all latches to ensure they will not accidentally pop open
Loose articles (mouthpieces, necks, other accessories) could become lost down inside the bell. It is better to pack these items separately and securely in bubble wrap so that they cannot bang around and hit the instrument.
Once inside the box, if the instrument can move around at all, it may become damaged. However, don’t wrap so tightly that the instrument is compressed. A snug fit that impairs movement will be fine!