This is an indication of how intact an individual leaf is found to be, following curing and any additional finishing processes. It also takes into account the general size of the leaf (as relates to suitability for a particular use), the overall color of the leaf, and the consistency of that color over the entire leaf surface. Usually, the “higher” the grade, the greater the market value (cost) of the leaf. But this does not limit its use for purposes not indicated by its “grade”.
Generally, though not necessarily, a larger leaf that is almost entirely free of small holes or tears. The various leaf grades (there are well over a dozen) assess the tensile strength, stretch, and thickness of secondary veins since their intended use is for the visible, exterior of a cigar or plug.
A binder requires greater tensile strength than does a wrapper since it must contain most of the compression force surrounding a cigar‘s filler bunch. Binders may have occasional, small holes and non-critical tears. Binders are often, though not all, thicker than wrappers.
The leaves of most cigar types of tobacco that are not intact enough to be used as wrappers or binders are graded as “filler”. Leaf graded as filler may contain the entire stem (central vein), or be frog-legged, by removal of only the thicker portion of the stem.
broken leaf and pieces
This is exactly what it says. Some are used in applications of shredded tobacco, while other is used for chemical extraction of the nicotine in industrial applications