These products are ONLY compatible with QuickBooks/Quicken software. They will not work with the ACS software.9 1/8 X 4 1/8Double Window EnvelopeUpper Window: 3 1/2 x 15/16• 3/8 from left• 2 3/8 from bottomLower Window: 3 1/2 x 1• 7/8 from left• 5/8 from bottom