Question 161747
The object you are describing is a rectangular prism. 
It's difficult to draw one on a screen. 
 
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{{{drawing( 300, 300, -10, 10, -10, 10,
circle( 2, 2, .2 ),
circle( 2, -2, .2 ),
circle( -4, -2, .2 ),
circle( -4, 2, .2 ),
line(2,2,2,-2),
line(2,-2,-4,-2),
line(-4,-2,-4,2),
line(-4,2,2,2),
circle( 8, 8, .2 ),
circle( 8, 4, .2 ),
circle( 2, 4, .2 ),
circle( 2, 8, .2 ),
line(8,8,8,4),
line(8,4,2,4),
line(2,4,2,8),
line(2,8,8,8),
green(line(2,8,-4,2)),
green(line(8,4,2,-2)),
green(line(-4,-2,2,4)),
green(line( 2, 2, 8, 8)))}}}
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Looking at each face it would look like a rectangle, while a cube looks like a square. 
Look around your room and you'll find objects that are rectangular prisms (books, etc.).  
Measure some and you might come close to your required dimensions.
Hope it helps.