For our apostolate work we bundle our cord rosaries into groups of 5, then rubber band the crucifixes together, and use a twist-tie at the other end. You can try bundling 10 together, but that's a little tricky. You don't have to twist tie the other end, but it helps a little more to keep the rosaries from tangling together. And it makes it easy for your recipient to open and distribute the rosaries as needed.
 
For chain rosaries, we put each in its own plastic bag. But you could also rubber band them the same way as the cord rosaries. Those little zip bags are available at big stores, like Walmart in the craft & sewing section - about 50 for $2, or online.

We use a reliable supplier: U-line for our zip bags.
 
We get our Jiffy-Lite brand name bubble shipping envelopes here
We found Jiffy-lite are the lightest so you don't have to pay more for a heavier weight envelope.

"Bubble" envelopes are an ounce lighter than "Padded" envelopes.

We use and re-use all the boxes that our own supplies come in. Anything to save a penny!
 
Remember, if you are shipping out of the country, you must fill out a Customs Form at the post office.
A shipment under four pounds uses the green form, over four uses the larger white form.
You'll be required to provide your name, signature, address and list the contents.
We just write in "religious items."  Marking "rosaries" or "scapulars" as the contents may get your recipient in big trouble if his country or the culture does not take kindly to Christians.

Check the box marked "Gift" and the value at zero, or $1.00 or less, otherwise your needy recipient will have to pay exorbitant taxes on your free gift.

List the contents as Religious Items.

*** Please note: With the latest new price hike through the US Post Office, Delivery by "ship" or "ground" may no longer be available to certain areas of the world, and packages must be air-mailed. 

Make sure to use a sturdy box for overseas shipping of more than 4 pounds weight. Otherwise, a bubble envelope works just fine.  Insurance and delivery confirmation are all up to you - everything costs money.

We rely on Our Lady and the Guardian angels

as our insurance and delivery! 

: )
 
One last note. If you are shipping to a non-Christian country and making your own shipping label, leave off any religious images, such as your company or mission logo, etc.
This also can cause trouble for your recipient, or your package may get "lost" or be destroyed by anti-Christian handlers, or will fall into the wrong hands for the wrong reasons. 

 : (