For retail businesses, footfall and visibility from the main road typically matter more than raw square footage, since a smaller but well-located space can outperform a larger one tucked away from natural traffic.
Check the lease terms for restrictions on signage, operating hours, and any exclusivity clauses that might limit or protect your business category within the same building or complex.
Understanding the profile of nearby businesses and residential catchment is also worth researching, since it directly affects the customer base you can realistically expect.