My theory:

Keep in mind that 5mg is VERY little. And so when you have one Dianabol pill, like the Thai pinkies, they are pretty big for 5mg, cuz it's not ALL Dianabol (i think). It's a concentration right? (not sure here i'm just guessing).

So, when it's 50mg, that isn't much either, and compacted within a pill, shouldn't be too big.

Example; Clomid pills aren't really all that big, and it has 50mg in it.

Another Example; Milk Thistle pills I have, have 4,500mg EACH capsule, and they are not really that big!