Here are some other useful measurements to know about standard playing cards: Standard playing card size mm: 64mm x 89mm Required bleed: 2mm along each edge Recommended margin: 5mm Rounded corner size: 3.5mm What Are The Different Playing Card Sizes
I feel compelled to remind players to buy within their means and focus on purchasing singles if the new cards are the main appeal to you
You can search by specific card, for example, if we want to look for things to do with Mindslaver or if you're really devilish, you can search by combo type, such as Gain control of all of target player's turns. Highly recommended
The Ur-Dragon is currently in the fifth spot of all-time commanders, but I expect that to change with the reprint (theres only a couple hundred decks between it and number four, barely a thousand between it and number three)
All the decks are Standard legal, so feel free to try them in Magic Arena as well as paper, although you shouldn't expect to have success with them in tournament play