I need help, quick! Decr a pattern

My sister’s baby shower is this Saturday. I’m knitting a basketweave patterned baby blanket for her. I just got this bright idea to knit my nephew’s name with each letter in a block. I have patterns for letters, but they’re for dishcloths.

So, if someone can please help here’s what I need.

The basketweave pattern is 15 stitches by 24 rows. The pattern for each of the letters are 36 stitches by 55 rows. How in the heck do I decrease this so I can knit it into the blanket?

Any help would be greatly appreciated!

Here are some smaller letters if that helps

Here is another one
Or you can make your own actual size graph paper here
And then you can make your own letters