What size cast iron skillet should I buy first?

The most-recommended starter sizes in the reviews we read are the 10.25-inch and 12-inch. Verified-purchase reviewers describe the 10.25-inch as the everyday workhorse that fits most burners and meal-prep needs, while r/castiron users note the 12-inch is heavier and can heat unevenly on induction but offers more cooking room.