Seventeen millimeters is the equivalent of 0.669 inches, or slightly more than 2/3 inch. One inch equals 2.54 centimeters and, therefore, 25.4 millimeters. Dividing 17 millimeters by 25.4 millimeters per inch gives the result of 0.669 inches.
Conversions between the metric system and the system used in the United States are potentially somewhat involved. Converting within the metric system, however, often requires simply the moving of a decimal point to the right or left. For instance, 1 decimeter equals 10 centimeters or 100 millimeters. The decimal point just moves one place to the right each time as the unit of measurement goes from larger to smaller. When the unit of measurement goes from smaller to larger, the decimal point moves to the left.
0.6692913386 in. Direct Conversion Formula. 17. mm. * 1 in. 25.4. mm. = 0.6692913386 in.
http://wiki.answers.com/Q/How_many_inches_does_17m...

1 inch = 2.54 cm = 25.4 mm. So 17mm would be 17/25.4, well you can't have decimal points in a fraction so 170/254 is better. Then you just reduce it to the lowest possible form. 170
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The standard bar is 42 inches high, which is 3 inches lower than your 45inch bar. Most standard bar stools are therefore built for the 42inchhigh bar, and have a seat height of
http://www.ehow.com/info_12010079_sizestoolheigh...

It depends on the aspect ratio (width/height) of the screen. 1080p(1920x1080) video would probably look good on it. It may even have a native resolution of 1920x1080 if it is a television
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