Give your dorm room floors a modern spark with this gothic-style motif. These grey foam interlocking tiles are the perfect accent to place near your bed or by your desk. Hamal Interlocking Floor Tiles Floor Tiles contains 22 pieces on 9 sheets that measure 11.4 x 11.4 inches. This product measures 34.2-in by 34.2-in by .4-in when assembled.