I have four Apple button designs in my collection that are rectangle or square.
Power Macintosh (c. 1995)
This button is 5.4×5.4 cm, featuring an image of a 1995-era Power Macintosh computer and Apple monitor over a background of flames with the words Power Macintosh in the Apple Garamond font.
Windows 95 = Macintosh ‘89 (c. 1995)
This button is black and white and measures 5.2×7.8 cm, featuring the classic multicolor Apple logo along with the words Windows 95 = Macintosh ’89 in the Apple Garamond font.
Yum. (c. 1999)
This button is white and measures 5.2×7.8 cm, featuring the word Yum. in the Apple Garamond font and five iMac computers in all five colors, tangerine, lime, strawberry, blueberry, and grape.
G5 It’s here. (2005)
This button is black and measures 5.2×7.8 cm, featuring the G5 logo and the words It’s here. in the Myriad Apple font.