Finding the Flavor of Chocolate. Gregory Ziegler puts a small block of chocolate into a styrofoam bowl and sticks it into the microwave. Soon, a lovely sweet aroma spreads through the air, lending warmth to the otherwise bleak lab. Ziegler takes the bowl out of the microwave; it's filled with a thick, swirling liquid.
First Class Large Envelope/Flat Mail. Minimum size: 6 1/8 inches tall or 11 1/2 inches long and 0.007 inches thick. Maximum size: 12 inches tall x 15 inches long and 3/4 inches thick. Maximum weight: Up to 13 oz.
The minimum size for First-Class Mail is 5 inches long, 3-1/2 inches high and 0.007 inches thick. The maximum size is 11-1/2 inches long, 6-1/8 inches high, and .75 inches thick. The maximum weight for letters is 3.5 ounces. The maximum weight for envelopes and packages is 16 ounces when you create and print your shipping label on eBay.