Very large; especially of something larger than normal for its type(adjective)
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Use "oversized" in a sentence
"So: fitted pants or jeans (preferably cropped at the ankle or alternatively falling onto the toe of the shoe itself), below the knee skirts (dig way back into the wardrobe), gilets, waistcoats, simple fitted shirts and plain oversized sweaters and Ts (Marks & Spencer anyone?)."
"And for good reason — they cook huge hunks of pork shoulder in oversized copper pots filled with lard."
"Typically encased in oversized plastic clamshells to deter shoplifting, memory cards are then placed inside larger cardboard boxes for shipment to customers."