Standard Postcard-a standard postcard mails First Class at current rate of 35Â¢. The smallest maiLabel size for ANY postcard is 3Â½â³ x 5.â³. The largest postcard size for mailing at the 35Â¢ rate is 4Â¼â³ x 6.â³. The paper thickness must be at least 0.007 â³ and not more than 0.016 â³ in thickness.
1 Prohibits head first diving in water depths less than 8 feet. 2  Restricts use of starting blocks to competitive swimmers or swimmer training activities.  Requires new installation (effective October 7, 1992) of starting blocks to be in the deep end in at least 6 feet of water.
There are so many disciplines, itâs confusing. Thereâs free diving with weights, free diving without weights, free diving with fins, and so on and so forth. But right now the world record for no limitsâa crazy discipline in which guys rig themselves onto machines and the machines take them down to depths very quicklyâis 700 feet. In 1949 scientists said the deepest we could possibly dive and survive was a hundred feet.