Coal size is an important factor in the mining industry, as it determines the efficiency of the extraction process. The crossword solutions for coal size include PEA (3 letters), SAAR (4 letters), EMBER (5 letters), HOD (3 letters), BIN (3 letters), and SEAM (4 letters). PEA is the smallest size of coal, while SAAR is slightly larger. EMBER is a medium-sized coal, and HOD is a large coal. BIN is an even larger coal, and SEAM is the largest size of coal.