For a 12x12 room, the cost of ceiling panels can vary depending on the material you choose, but on average, you're looking at around $300 to $600. If you're on a budget, I'd recommend going with vinyl or PVC panels, they're pretty affordable and look great, plus they're easy to install and maintain. A pack of 12 to 16 panels usually costs between $50 to $100, so for a 12x12 room, you'd need around 2 to 3 packs, depending on the pattern and design you want. They come in a variety of styles and colors, so you can find something that fits your decor without breaking the bank.