You can now get a range of recycled paper stock in several subtle shades in most parts of the world. The compatibility of recycled paper and photocopiers has greatly improved in the past few years. This is not to be assumed, however. The short fibres of some recycled papers can foul certain machines resulting in paper-jams. This most commonly arises when printing double-sided, when the paper is passed through the machine a second time. Such paper can also become very brittle with double-sided copying, when it is unable to negotiate the paper path - again causing frequent paper jams.
Paper quality can vary enormously. Avoid thin paper, which is liable to wrinkle up when passed through a photocopier a second time. Environmental humidity and the moisture content of the paper is another cause of difficulties, particularly with "softer" papers. Paper is best when brought fresh from the manufacturer, used from unopened packets, or when opened, stored in relatively dry conditions.
The United States uses imperial paper sizes (for printing, most commonly 8.5" x 11" or "quarto" size). Most other countries use the A,B,C... standard formats, eg. A4 (210mm x 297mm) for general copying. Some countries use a longer sheet ("foolscap" or "legal") as standard. Local paper size may be important if you use desktop publishing software or foreign-made printing and photocopy machines with non-adjustable paper trays.
Single sheet A4 (or similar sized) Bulletins require no collation and stapling. They can be filled relatively rapidly and so serve frequent release of new messages. A double-sided and folded A3 (folio size) sheet would be an alternative format for long contributions or very high volume of messages.
If the Bulletins are to be posted on a wall or message board (see Wall Space / Horus Display / I7) this is best done when the originals are enlarged - eg. from A4 to A3, or from 8.5" x 11" to 11" x 17". If you are planning to do this, be sure to have the larger size paper in stock, and to see that the photocopier can handle enlargement. See also Photocopiers / I12