Zoom Icon - ICNS Format.

256 x 256
Zoom icon 256x256Download
128 x 128
Zoom icon 128x128Download
64 x 64
Zoom icon 64x64Download
48 x 48
Zoom icon 48x48Download

32 x 32
Zoom icon 32x32Download
16 x 16
Zoom icon 16x16Download

More icons from the Actions icon set: