On average the rates have gone up about $10. I use 15x11x7 insulated boxes and it went from an average of $38 to $46-$48 for Next Day Air. But if I were to use a 12x9x6 box it would knock it back down to around the $38 range. In the last 3 years the rates have gone up about $20 per package for next day shippments.
