Larger binoculars with more power often have narrower fields of vision and are heavier.
What do those binocular numbers mean? The first number is the magnification, while the second number is the size in millimeters of the lenses.  So a 7x35 pair means that these binoculars will magnify 7x, and have lenses 35 mm in diameter. When starting out it is tempting to get the biggest you can find, but try not to get anything much more powerful than a 10x50 pair at first. Larger binoculars with more power often have narrower fields of vision and are heavier. So, while technically more powerful, they are much more difficult to hold steady in your hands and "jiggle" quite a bit-unless you buy binoculars with image stabilization, or mount them to a tripod.