Bony PVC Series of Acoustic Fiberglass Ceiling Tiles This is another popular choice of ceiling tiles for the low-end market. Low density fiberglass combined with PVC sheets to make these economy ceiling tile. These tiles are available in square lay-in only. No back cover and side coating to keep down the price. Standard sizes range from 300 x 300 mm (or 12" x 12") to 600 x 600 (or 2' x 2').