You can squeeze through a space as narrow as 1 inch wide, provided you are wearing and carrying nothing. You have advantage on ability checks you make to initiate or escape a grapple.

While in object form, the mimic adheres to anything that touches it. A Large or smaller creature adhered to the mimic is also grappled by it (escape DC is 9 + your proficiency). Ability checks made to escape this grapple have disadvantage.

The mimic can use its action to polymorph into an object or back into its original humanoid form. Limited to simple furniture, items, weapons or containers.

• When  you change into an object, roll a d20 and add your deception modifier, that will be the level of insight needed to tell you apart from a normal object. (Repeat this roll every 10 minutes. Nat 20's only count as a DC 20 instead of it being impossible to tell you apart for 10 minutes)
• When in object form you are still able to move (though doing so will alert others to your true self) and you are limited to the pseudopod and bite actions only. You are unable to use items, spells and other unique actions.
• Your AC in this form is 11 + your DEX modifier. You choose whether your equipment falls to the ground or is merged into your new form.

As a bonus action, you can extrude a pseudopod that is up to 6 inches wide and 10 feet long or reabsorb it into your body. As part of the same bonus action, you can use this pseudopod to manipulate an object, open or close a door or container, or pick up or set down a Tiny object. The pseudopod contains no sensory organs and can’t attack, activate magic items, or lift more than 10 pounds.

You morph part of your body into a gaping maw, allowing you to take the bite action against a single target.

You can see in dim light within 60 ft of you as if it were bright light, and in darkness as if it were dim light, only discerning colors in that darkness as shades of gray.

Through your ability to hide in any environment, you have gained proficiency in the stealth skill