I will combine shipping for the lowest possible cost.
Please note that shipping cost includes the price of a photo mailer with cardboard inserts.
The ones I use cost $1.10 for 6x9 and $1.30 for 9x12 sizes.
For photos shipped in a flat-rate Priority Mail box, there is no charge for shipping supplies.
I use neon-colored Fragile and Do Not Bend stickers on both sides of the mailer.
