Tobacco allowances follow a standard template worldwide: a fixed count of cigarettes, commonly a couple of hundred or fewer, with alternative equivalents for cigars, cigarillos, and loose tobacco, and you generally choose one category or a proportional mix rather than the full amount of each. The trend has been downward for years, with several countries cutting allowances sharply for public health reasons, so old memories of generous limits are unreliable.
A few wrinkles catch travelers. Some countries tax tobacco heavily even within the allowance for certain arrival routes, others require every stick declared regardless of quantity, and e-cigarettes and vaping products are a separate minefield: banned outright in some jurisdictions, restricted or age-gated in others, and rules for them do not follow the tobacco allowance.
Exceeding the limit means paying duty and tax on the excess at rates designed to discourage exactly that, and undeclared excess risks seizure and fines. Check the destination customs website for the current figures, and check separately for vaping rules before packing any device.