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 term âlarge envelopesâ (also known as flat mail) refers to First Class Mail sent in envelopes that exceed either 6&frac18;â in height, 11Â½â in width, or Â¼â in thickness.nvelopes used for flat mail cannot be more than Â¾â thick, 12â high, 15â long or weigh more than 13 ounces. The USPS considers any envelope bigger than this size to be a package, and will be subject to parcel prices.