I typically use Dragon Shield sleeves and was having this issue, but I have news!! DS has released a line of 'board game sleeves.' They are listed in their website but only have the inner dimensions. I wrote and asked for the outer dimensions and some of their sleeves will now fit in your boxes. Their full answer with measurements is copied below:
Hi Samir,
I'm Pedro and welcome to the dragons den! 🐲️
You're absolutely right! Outer sleeve dimensions are important for compatibility with storage solutions, and we really appreciate you pointing that out. We're thrilled to hear you're excited about them! 🐉
While the packaging focuses on the card size the sleeves are designed to fit, I’d be happy to share the outer dimensions with you:
For example, our sleeves for cards measuring 63.5 x 88 mm (Standard Size) have an outer dimension of approximately 66 x 91 mm.
Sleeves for 59 x 92 mm cards (e.g., for games like Dominion) have outer dimensions of roughly 61 x 94 mm.
Similarly, our other board game sleeve sizes have a small margin of about 2 to 2.5 mm larger in both width and height than the card size, depending on the thickness and cut.
Our dragons hope this information helps!
Please never hesitate to reach out we are always available to help.
Kind regards,
Pedro Monteiro
Customer Service
Arcane Tinmen ApS | Oervadsvej 55A | 8220 Brabrand | Denmark
www.dragonshield.com