Small bathrooms can range from 15 to 72 square feet. It is important to consider the space limitations to design an effective layout. Some tips for small bathrooms include using pedestal sinks instead of large vanities to save space, paying attention to door swing for more usable area, and considering if windows are worth sacrificing space for other fixtures. Combining a shower and bathtub can help maximize space in tight areas. Overall, creative design that thinks outside the box can help make the most of even a constrained bathroom remodel budget.