Playing Tiny Characters

There are a few races in the land of Rune that would be considered tiny and I wouldn't want to deny my players a chance to play as those creatures if they so choose and if the game allows it. I am stealing these simple rules to govern how I would approach tiny characters in D&D 5th edition from here.

Sticking to 5e RAW where available House Rules
 * No numerical bonuses/penalties for size such as to ability scores or skills like existed in 3.5
 * Tiny characters cannot use weapons sized for Medium creatures (see house rule below)
 * Tiny characters cannot grapple Medium creatures
 * Tiny characters can move through the space of a Medium or larger enemy as difficult terrain
 * Tiny characters have 1/2 the carrying capacity of a Medium or Small character
 * Tiny Weapons use damage dice 2 steps lower than weapons sized for Medium characters (i.e. d8 becomes d4) to a minimum of 1 damage.
 * Tiny Ranged Weapons have 1/2 the range of their Medium sized counterparts
 * Items sized for tiny characters weigh 1/10 their standard weight (picked mostly for easy math)
 * Tiny characters can share a square with a single ally without them crowding one another (but if they are in the same square as an ally Rogue, they do not grant Sneak Attack to the Rogue while in the same square)
 * Tiny characters treat sources of cover as logic dictates depending on how much of their body is blocked by the object or character being used for cover
 * Tiny characters should expect to qualify for Advantage or Disadvantage if Medium characters dealing with similarly oversized conditions (such as inside a community of Cloud Giants) would expect to qualify