Hi Suzy!
The type size will depend on how and what size you're planning to display your logo. If you plan to have it like the way you have it now on your website, the type size will be easy enough to read but, looking at it as is, I'd say it'd be pretty difficult so we may need to adjust.
Anyway, I can provide you with different iterations of the logo (includes the reversed out version) which includes: 1. Just the logo (without the contact info) 2. Logo with just the website address and 3. Logo with the website and contact info so you can use it in different applications.
Do you have a particular size for your sticker? I can send you the actual size of the layout so you can print it and check :)
Regards,
Luigi