Track counts vary by release: some singles list two main songs (and some single releases also include instrumental versions), while EPs typically list more tracks — commonly four to six songs. Instrumental tracks appear on certain single releases.
Some editions are produced in collaboration with contemporary artists and feature artist-themed packaging and extras. These special editions can include nonstandard packaging (for example drawstring or cross-bag styles) and additional printed extras such as postcards, photo books, and photo cards alongside the CD and jewel-case materials.
Dimensions vary by release. Examples listed include: 175 x 129 x 24 mm; 304 x 234 x 30 mm; 312 x 312 x 20 mm; 155 x 210 x 45 mm; and 148 x 185 x 35 mm.