Microphone Cover Set - 6 pieces foam mic cover, 2.8 x 2.3 inches, caliber size is 1.4 inches, suitable for most standard handheld microphone, not for headset mic.Foam windscreen - Eliminates a bit more of that background noise during our recording sessions.They don't muffle the sound and are washable, makes this a practical and sanitary.Perfect Filter - Microphone covers help quite a lot with the pops and wind and a little bit with the sibilant "s" without altering the natural sound of the mic.Widely Application - Microphone Foam Windscreen can be used for singing, voiceover, ktv, dance ball, conference room, news interviews, stage performance and other places and anywhere else you need quality sound.Tips - The foam microphone cover is placed in a vacuum package, so please put it out for a little time then it will return to its original shape. If you still feel that they cannot return to its original shape, you can also try soaking them in water And take them out and let them dry.