Chances are that they make a large portion of their revenue from selling singles
For standard Pokmon cards (up to ~35pt), the 35pt version is a popular choice: it has internal dimensions of about 7
5 TWEAKED CARD EFFECTS Since the anime would be the first introduction to the card game, one would think that the cards would always be one to one translations, but somehow they're not
Full Armored Dark Knight Lancer X WATER Rank 7 [ Aqua / XyzEffect ] ATK 2800 DEF 1500 3 Level 7 monsters Once per turn, you can also Xyz Summon "Full Armored Dark Knight Lancer" by using 1 Rank 5 or 6 Xyz Monster you control
They were initially envisioned as small red creatures, which sounds like goblins
Brand: YuGiOh Company: Konami Series: Premium Pack 2 Item Type: Single Card UPC: 0666714232184 Stock #: 195346 Our Guarantees to You, Our Valued Customer