PNG ICO ICNS MORE
UI
Pixel
Gnome icons
Attachment, mail
Gray
32x32
Tango
mail, Attachment
Black
Glyph
Ecqlipse 2
Attachment
128x128
Smooth
User Interface Icons
Attachment, remove
Gold
80x80
Attachment, Add
paper clip, Attach, Attachment
16x16
PNG MORE
Mixed
Twotiny
paper clip, Attachment, document
Lavender
14x17
Network & communications
Oxygen
document, Attachment, gramar
WhiteSmoke
DarkSlateGray
48x48
mail, Attachment, paper clip
Shopping & e-commerce
green, Attachment
256x256
Attachment, Blue
Siena
yellow, Attachment
Fugue Icons
envelope, Message, Letter
Mini
Attachment, paper clip
Page, Attachment
LightBlue