The Oval Extra Large Viewfinder Eyecushion in genuine English chamois, from Bluestar, features outside dimensions of 5.1 x 3.6" to securely fit over many common external and built-in viewfinders. The back on a standard large oval has less material and is designed for a faster fit but possibly less secure.
These include the Alphatron, the Kamerar QV-1, VF-4, and VF-4 EVFs, the MagView 3:2, 4:3, and 16:9 EVFs, those of the Canon C100, C200, C300, C500, XF300, XF305, and XF205 HD cameras, the EVFs of the Sony FS5, HVR-S270, HXR-NX100, and PXW-Z150 cameras, and many more. This genuine English chamois version is made of 100% natural oil-tanned sheepskin leather that provides a high level of softness and perspiration absorption. It can be used in any climate.