Match the food and flame
Dosa and roti cooking favour different working surfaces and movements. Consider usable diameter, rim profile, weight and the way the tawa will be lifted and stored.
Confirm construction
Ask for exact metal composition, food-contact lining if relevant, base construction and compatible heat sources. Do not infer induction suitability from appearance.
Plan for ownership
A good choice includes cleaning, drying, storage and any future relining or restoration process—not merely the first use.