No, wild shape does not automatically break the grapple. Grappling applies the ‘grappled’ condition and conditions are not automatically removed when you wild shape. Further, once you have the grappled condition, the restrictions on grappling target size does not matter.
Is ending a grapple an action?
A grappled creature can use its action to escape. To do so, it must succeed on a Strength (Athletics) or Dexterity (Acrobatics) check contested by your Strength (Athletics) check.
What should I do with a druid in wild shape?
As a DM, you should work directly with your druid player to determine what beast shapes they know. If your player has a particular beast they want to transform into (that follows the rules of Wild Shape), you should let them! Wild Shape has a few fiddly rules that new druid players (and their DMs) should be familiar with.
How to stop wild shaping while being grappled?
Common DM responses to wild shaping while being grappled would likely be: Automatically break grapple (least likely imho) Instantly force a roll to escape the grapple. Stop the shape-shift all together due to constriction of previous form (useful for small objects shifting in to large objects while heavily constrained)
Can a druid of the circle of the Moon use wild shape?
Other creatures may appear in published adventures, and should only be used with your DM’s permission. Druids of the Circle of the Moon can use Wild Shape to assume high-CR forms in combat as early as 2nd level, but druids of other circles can only really use Wild Shape in combat at low levels.
Can a druid turn into a beast in RuneScape?
A druid can only transform into a beast using their Wild Shape feature, and even then can only take the form of a beast they’ve seen before. Xanathar’s Guide to Everything includes a valuable guide on how to help druids who have just gained the Wild Shape feature determine what beasts they’ve seen before.