90g/m2 (107mm x 128mm) Self-Seal Compatible Wage Window Envelopes. For a professional, secure and efficient payroll, deliver your Sage Payslips with Sage Payslip Envelopes. Designed to show only the employee's name in the envelope window and with a secure self-sealing function, the Sage Payslip Envelope is the full professional solution. Self seal wage envelopes for use with Sage SE32 and SE95 pay advice slips. Suitable for cash.