These clear covers prevent excessive moisture loss. The Standard Cover fits 7 1/2 × 11 3/4" pans, including item# 629010, item# 629011, and item# 629003 pans. The Deluxe Cover fits 9 × 12 3/4" pans, including item# 629000, item# 629002, item# 629004, and item# 629005 pans.