Pricing: Starts at $14.40 for a flat-rate envelope. Service: Next day delivery to most locations. Delivery is offered 365 days a year, including weekends and holidays at no extra charge. Packaging Requirements: Please complete an Express Mail label (obtainable for free at your local Post Office™) and attach to your package. Package must weigh 70 pounds or less and measure 108 inches or less in combined length and girth (measure around all 4 sides of package). Other features: Free package tracking service, up to $100 insurance coverage provided at no cost.