(You might feel comfortable playing, say, 24 or 25 lands instead of 23)
For example, in Commander, if your opposing Commander dies, you can get it back and back again, but wither can just neuter it
If you just want the tl;dr and my bottom-line assessment: MTGProxy is one of the better sites out there to order from they have tons of ordering options, reasonably fast shipping, and very solid card quality
An MTG cards length is 2.5, its width (i.e., thickness) is 0.012, and its height is 3.5
The problem is their art designs are relatively limited, and personally, I like the designs from other companies better
The first was an elf deck centered around my four copies of Stone-Tongue Basilisk, the first rare card I ever got four copies of, my sole copy of Natures Revolt, an enchant that turned all lands into 2/2 creatures, and Hurricane, a spell that dealt X damage to both players and all creatures with Flying