How to say it might be a bit big but this envelope will do just fine it's better to be too big than too small in Japanese
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ちょっとちょっと(chotto) (adv) just a minute/short time/just a little/somewhat/easily/readily/rather/ easily/hey!大き大き(ooki) (pref) great/grand/large/greater/upper/senior/a great deal/very muchいい(i) (prt) strengthens a question, assertion, etc.けどけど(kedo) (conj,prt) but/however/although、、(、) Japanese commaこのこの(kono) (n) this封筒封筒(fuutou) (n) envelopeでで(de) (prt) indicates location of action/at/in/indicates time of action/indicates means of action/cause of effect/by/and then/so/indicates continuing action/ indicates certainty, emphasis, etc.いいやいいや(iiya) (int) no/nay/well/er/why大大(dai) (pref) big/largeはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh小小(shou) (pref) small/narrow/familiar prefix/slightly/a bitをを(wo) (prt) indicates direct object of action/indicates subject of causative expression/indicates an area traversed/indicates time over which action takes place/indicates point of departure or separation of action/indicates object of desire, like, hate,兼兼(ken) (conj) cum/holding both roles/and/in addition/concurrently/at the same timeねね(ne) (prt) indicates emphasis, agreement, request for confirmation, etc./is it so/hey/come onるってno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb言う言う(iu) (v5u) to say/to call/to go/to make a noiseしし(shi) (num) 10^24/septillion/quadrillion
