For more great reads, check out our guide to the best MTG Arena decks you can play, or the MTG release schedule.
Jumpstart booster packs are loaded with cards from throughout Magic The Gathering (MTG) history plus 37 cards that get their first-ever printing and dozens of cards from Core Set 2021 (M21) Draft Booster Boxes There are 36 packs in a draft booster box, usually with 10 commons, three uncommons, a rare or mythic rare, and a basic land, plus the merchandising/token card
In fact, in Legacy, I board it in against both Death and Taxes and Jeskai Control even though neither deck really interacts with their graveyard, simply for the previously mentioned reasons
Some deviation in the size of Magic the Gathering cards, at least in weight, is expected