Envelope adjectives are listed in this post. Each word below can often be found in front of the noun envelope in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing ENVELOPE.
atmospheric, big, blank, blue, brown, bulky, closed, colored, common, crumpled, double, empty, external
fat, fibrous, first, floral, folded, gaseous, green, heavy, huge, inner, large, larger, last
like, little, long, looking, luminous, manilla, new, next, nuclear, official, old, open, orange
original, other, outer, own, padded, paid, physical, pink, plain, plastic, protective, red, same
sealed, second, separate, single, size, sized, small, smaller, special, square, stamped, thick, thin
third, tiny, torn, unmarked, unopened, unsealed, viral, white, yellow, yellowed
Hope this word list had the adjective used with envelope you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.