To ensure these are the correct cups for your blender, please pay closer attention to the sizes on the images and description. These cups have 3 7/8" diameter. Measure your cup diameter and it must be about 3 7/8” which is a little less than 4". Does NOT fit Ninja Blenders that have a 3 1/8" diameter or came with a 16 Ounce Cups. Please see all pictures for size reference and fit. Does NOT fit Ninja Blenders that have a 3 1/8" diameter or came with a 16 Ounce Cups.