: A classic overcoat should fall at or slightly below the knee. Shorter styles (topcoats) usually end mid-thigh. sizing an overcoat/topcoat - Ask Andy About Clothes
: You should be able to button the coat comfortably without any pulling or tension across the chest.
To ensure you have the right size, check these specific areas while wearing your heaviest expected layer (like a blazer):
: If you are between sizes, always round up . It is much easier for a tailor to take a coat in than to let one out if it's too tight. Critical Fit Checkpoints
: If you plan to wear the coat only over thin layers like a t-shirt or a dress shirt for a modern, slim look, consider buying one size smaller than your suit size.
: The sleeves should completely cover your suit jacket and shirt cuffs, reaching about a half-inch past the wrist bone or grazing the top of your hand.