10/20
A lifeguarding term describing the 10/20 Protection Standard set by Ellis & Associates. Lifeguards must: - Within 10 seconds: Scan their zone and detect any signs of trouble. - Within 20 seconds: Be able to reach and intervene with a guest in distress. Following the 10/20 Protection Standard to recognize and respond to any aquatic emergency within a total of 30 seconds has proven to save lives. This 10/20 Protection standard is also the basis to create and validate lifeguards' zones of protection, which are specific areas of water assigned to each lifeguard. If a lifeguard cannot maintain 10/20 within their zone, it must be adjusted. The foundation behind the Ellis Scanning Method.
The Urban Dictionary Tee
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Measurements may vary by up to 2" (5 cm). Pro tip: Measure one of your t-shirts at home and compare!
A - Length
Measure from the top of the collar to the bottom hem
B - Width
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Size Chart
| Size | Length | Width |
|---|---|---|
| XS | 27" | 16½" |
| S | 28" | 18" |
| M | 29" | 20" |
| L | 30" | 22" |
| XL | 31" | 24" |
| 2XL | 32" | 26" |
| 3XL | 33" | 28" |
| Size | Length | Width |
|---|---|---|
| XS | 69 cm | 42 cm |
| S | 71 cm | 46 cm |
| M | 74 cm | 51 cm |
| L | 76 cm | 56 cm |
| XL | 79 cm | 61 cm |
| 2XL | 81 cm | 66 cm |
| 3XL | 84 cm | 71 cm |