Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Shut

As shut as evening flowers.
—Anonymous

Shut as the leaves of a white rose may
Ere the wan bud blooms out perfectly.
—James Whitcomb Riley

Shut like a purse.
—Jonathan Swift

My heart is shut
As a sealed spring of fire.
—Algernon Charles Swinburne

Shut from approach like sea-nymph in a shell.
—N. P. Willis