The earpads are compatible with Sony headphones below:

Sony MDR-7506 , MDR-CD900ST, MDR-V6, MDR-V7 

Fabric Earpads
Outer Diameter: 103mm*85mm
Inner Diameter: 60mm*44mm
Height: 22mm
Filter: No
Bracket: Yes
Colors: Black

Lambskin Earpads
Outer Diameter: 105mm*83mm
Inner Diameter: 60mm*40mm
Height: 24mm
Filter: No
Bracket: Yes
Colors: Black

Protein Leather
Outer Diameter: 100mm*75mm
Inner Diameter: 63mm*36mm
Height: 20mm
Filter: No
Bracket: Yes
Colors: Black