Letter Seals is wonderful! I purchased sealing wax from LS probably back in 2007/2008(ish), and was delighted to see that over a decade later I could still get wonderful seals and wax for my letters. The seals are wonderful and high quality. The designs are crisp. I'm looking forward to designing my own insignia and have LS make me a custom seal! Also I did a test of the seals (on the inside of a card) to see how they after going through the mail and they looked perfect with no bending or creasing.
I recommend this product
The Perfect Seal