101 × 74 mm outer dimensions; 60 × 32 mm inner opening; 20 mm listed dimension.
Sound / ANC
Dekoni describes its pads as intended to restore comfort and sound isolation. It also says pad material can affect sound; no ATH-MSR7-specific acoustic measurement or ANC claim was found.
Dekoni’s product page explicitly lists ATH-MSR7 as a compatible model, separate from ATH-MSR7B. It lists material options and dimensions of 101 × 74 mm outer, 60 × 32 mm inner, and 20 mm.
Brainwavz describes the oval pads as universal fit, gives 110 × 90 mm dimensions, a 50 × 70 mm inner hole, and lists ATH-MSR7 in its compatibility chart.