8 1/2 x 11 in. size, 3 letters
8 1/2 x 11 paper size (Abbr.), 3 letters
8 1/2 x 11 size, briefly, 3 letters
8 1/2 x 11 size: Abbr., 3 letters
A secy might take one from a CEO, 3 letters
Abbr. on a copier paper tray, 3 letters
Abbr. on a copier tray, 3 letters
Alphabet unit: abbr., 3 letters
An SASE may accompany one, 3 letters
Brief correspondence?, 3 letters
Common Amer. paper size, 3 letters
Common paper size: Abbr., 3 letters
Copier paper setting: Abbr., 3 letters
Copier paper size: Abbr., 3 letters
Copier tray size: Abbr., 3 letters
Copy machine setting: Abbr., 3 letters
Crossword box entry: Abbr., 3 letters
Crossword entry: Abbr., 3 letters
Delivered piece: Abbr., 3 letters
Delta, for one: Abbr., 3 letters
E or G, e.g.: abbr., 3 letters
E-mail predecessor: Abbr., 3 letters
Env. contents, possibly, 3 letters
Envelope enclosure: Abbr., 3 letters
Form of recommendation (abbr.), 3 letters
It sometimes includes a P.S., 3 letters
It's marked SWAK, maybe, 3 letters
It's put in an env., 3 letters
Item in the mail: Abbr., 3 letters
Legal alternative: Abbr., 3 letters
Legal's counterpart: Abbr., 3 letters
Mailbox item: Abbr., 3 letters
Many a grade: Abbr., 3 letters
One photocopier tray: Abbr., 3 letters
Paper tray size: Abbr., 3 letters
Photocopier option: Abbr., 3 letters
Photocopier tray size: Abbr., 3 letters
Photocopier tray: Abbr., 3 letters
Piece of mail (abbr.), 3 letters
Post office delivery: Abbr., 3 letters
Printing paper size (abbr.), 3 letters
Quaint communication: Abbr., 3 letters
Scrabble tile (abbr.), 3 letters
Scrabble unit (abbr.), 3 letters
Something to send to your congressman, briefly, 3 letters
Stamped item: Abbr., 3 letters
Vanna revelation: abbr., 3 letters
Blue pigments derived from lapis lazuli, 7 letters
A, B and C, briefly, 4 letters
Alphabet components: Abbr., 4 letters
Books contain lots of these: abbr., 4 letters
Books contain many of these: abbr., 4 letters
Contents of many files: Abbr., 4 letters
Corp. communications, 4 letters
Crossword fillers (abbr.), 4 letters
Crossword fodder: Abbr., 4 letters
Items in a P.O. box, 4 letters
Items in mailboxes: Abbr., 4 letters
Mailbox items: Abbr., 4 letters
Office corr., sometimes, 4 letters
P and L, e.g.: Abbr., 4 letters
Pers. correspondence, 4 letters
Serious dating, in personal ads, 4 letters
Sr. varsity athletes get them, 4 letters
There are 185 in this puzzle: Abbr., 4 letters
U.S.P.S. cargo: Abbr., 4 letters
U.S.P.S. deliveries, 4 letters
Vanna's concerns: abbr., 4 letters