I send only USPS! Too many horror stories from BROWN! Ship it priority(fewer hands touch it) and delivery confirmation so they can track it if necessary.
I use 3", thin wall PVC tube with end caps and packing tape. Put wadded news paper or foam in each end to protect tips and other packing around(bubble wrap or wadded news paper) the bow. I just bought a tube yesterday to ship the newest ELB I just posted. Also, add your address inside in case the shipping label is damaged.
Go to USPS website for sizes, postage and possible additional postage for oversize. Pat