> Mailing things in the US always ends with you having to awkwardly tri-fold papers and hope that you didn't botch it, so that the result will fit in your envel

> Mailing things in the US always ends with you having to awkwardly tri-fold papers and hope that you didn't botch it, so that the result will fit in your envelope of a non-standard size. Just use the envelope to measure where to fold.