Hi @Noda as mentioned I am looking to resize the logo on the Illdy Theme, Thanks again for you patience and support.
Hello,
I hope you are doing well today.
You can use the following CSS code to change the image size by going to Appearance > Customize > Additional CSS and pasting it there.
/*Logo image size*/
img.header-logo-img {
width: 170px;
}
Best Regards,
Support
Thanks Support. 
Sorry about this, but I’m afraid that it didn’t work.
Hey there
Can i see the website url?
please provide link and i will check it