What size should a slimline really be?

Hi friends! I hope you are having a great day! I’ve jumped on the slimline wagon and have made several slimline cards. But before I made the first one, I did some research online to learn as much about them as I could.

The slimline card was originally designed to fit into a #10 business envelope which measures 9-1/2″ x 4-1/8″. The most common size slimline card being made is 8-1/2″ x 3-1/2″ which is a bit small, in my opinion, for the #10 envelope. I personally have a ‘thing’ about an envelope swallowing a card.

I’m somewhat of a rebel so I decided to create my own dimensions – and I make mine 9″ x 3-3/4″ which fits perfectly into a #10 business envelope and allows for layers and ‘normal’ embellishments that aren’t off-the-charts huge.

I’m just wondering how others feel about the size. Does anyone else agree that the envelope being 1″ longer and 5/8″ wider than the card is weird? Or am I weird, lol?!

I’m curious about what other crafters think, so let’s do a poll! ;)