| 1 | Custom: Deal—Fox Home Entertainment (X-3 Stan Lee DVD Comic) | Reprints X-Men (1st Series) # 1; Reprints X-Men (1st Series) # 4; Reprints X-Men (1st Series) # 9; 1st appearance of X-Men; 1st appearance of Angel; 1st appearance of Angel II; 1st appearance of Beast; 1st appearance of Cyclops; 1st appearance of Iceman; 1st appearance of Marvel Girl; 1st appearance of Professor X; 1st appearance of Magneto; 1st appearance of Brotherhood of Evil Mutants; 1st appearance of Mastermind; 1st appearance of Quicksilver; 1st appearance of Scarlet Witch; 1st appearance of Toad; 1st appearance of Lucifer; 96 pages; Digest-size |
| 1/NS | Custom: Deal—Fox Home Entertainment (X-3 Stan Lee DVD Comic) | Reprints X-Men (1st Series) # 1; Reprints X-Men (1st Series) # 4; Reprints X-Men (1st Series) # 9; 1st appearance of Angel; 1st appearance of Angel II; 1st appearance of Beast; 1st appearance of Brotherhood of Evil Mutants; 1st appearance of Cyclops; 1st appearance of Iceman; 1st appearance of Lucifer; 1st appearance of Magneto; 1st appearance of Marvel Girl; 1st appearance of Mastermind; 1st appearance of Professor X; 1st appearance of Quicksilver; 1st appearance of Scarlet Witch; 1st appearance of Toad; 1st appearance of X-Men; 96 pages; Digest-size |
| 1 | Ultimate X-Men | 1st appearance of Professor X (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Beast (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of X-Men (Ultimate) |
| 1/H | Ultimate X-Men | 1st Appearance of Professor X (Ultimate); 1st Appearance of Cyclops (Ultimate); 1st Appearance of Marvel Girl (Ultimate); 1st Appearance of Iceman (Ultimate); 1st Appearance of Beast (Ultimate); 1st Appearance of Storm (Ultimate); 1st Appearance of Colossus (Ultimate); 1st Appearance of Wolverine (Ultimate); 1st Appearance of Brotherhood of Mutants (Ultimate); 1st Appearance of Magneto (Ultimate); 1st Appearance of Quicksilver (Ultimate); 1st Appearance of Scarlet Witch (Ultimate); 1st Appearance of Toad (Ultimate); 1st Appearance of Sentinels (Ultimate); 1st Appearance of Boliver Trask (Ultimate); 1st Appearance of X-Men (Ultimate) |
| 1/NS | Ultimate X-Men | 1st appearance of Beast (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Professor X (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of X-Men (Ultimate) |
| 1 | Ultimate X-Men (Marvel UK) | 1st appearance of Professor X (Ultimate); 1st appearance of Cyclops (Ultimate); 1st appearance of Marvel Girl (Ultimate); 1st appearance of Iceman (Ultimate); 1st appearance of Beast (Ultimate); 1st appearance of Storm (Ultimate); 1st appearance of Colossus (Ultimate); 1st appearance of Wolverine (Ultimate); 1st appearance of Brotherhood of Mutants (Ultimate); 1st appearance of Magneto (Ultimate); 1st appearance of Quicksilver (Ultimate); 1st appearance of Scarlet Witch (Ultimate); 1st appearance of Toad (Ultimate); 1st appearance of Sentinels (Ultimate); 1st appearance of Boliver Trask (Ultimate); 1st appearance of X-Men (Ultimate) |
| 1 | X-Men (1st series) | 1st appearance of X-Men; 1st appearance of Magneto; 1st appearance of Professor X; 1st appearance of Angel (Warren Worthington III); 1st appearance of Beast (Hank McCoy); 1st appearance of Cyclops (Scott Summers); 1st appearance of Iceman (Bobby Drake); 1st appearance of Marvel Girl (Jean Grey); Origin of X-Men |
| 1-2 | X-Men (1st Series) | 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men; Kevin Dooley LOC; St appearance of Cyclops (Scott Summers) |
| 1/A | X-Men (1st Series) | 1st appearance of Angel (Warren Worthington III); 1st appearance of Beast (Hank McCoy); 1st appearance of Cyclops (Scott Summers); 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men; Kevin Dooley LOC |
| 1/B | X-Men (1st Series) | 1st appearance of Angel (Warren Worthington III); 1st appearance of Beast (Hank McCoy); 1st appearance of Cyclops (Scott Summers); 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men; Kevin Dooley LOC |
| 1/C | X-Men (1st Series) | 1st appearance of Angel (Warren Worthington III); 1st appearance of Beast (Hank McCoy); 1st appearance of Cyclops (Scott Summers); 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men; Kevin Dooley LOC |
| 1/D | X-Men (1st Series) | Origin of X-Men; 1st Appearance of Professor X; 1st Appearance of X-Men; 1st Appearance of Angel (Warren Worthington III); 1st Appearance of Beast (Hank McCoy); 1st Appearance of Cyclops (Scott Summers); 1st Appearance of Iceman (Bobby Drake); 1st Appearance of Marvel Girl (Jean Grey); 1st Appearance of Magneto |
| 1/E | X-Men (1st Series) | 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men; Kevin Dooley LOC; St appearance of Cyclops (Scott Summers) |
| 1 | X-Men (UK Edition) | 1st appearance of Angel (Warren Worthington III); 1st appearance of Beast (Hank McCoy); 1st appearance of Cyclops (Scott Summers); 1st appearance of Iceman (Bobby Drake); 1st appearance of Magneto; 1st appearance of Marvel Girl (Jean Grey); 1st appearance of Professor X; 1st appearance of X-Men; Origin of X-Men |