simple delivery where is the small letter under 100g option ?

[dantwocats]

just looked at my smaller items (under £10 and under 100g) and postage is £2.74 ,we have been told theses are exempted , The simple delivery Q&A SAYS 

• Letter-sized items that are £10 or under and weighing 100g or less are eligible for Simple Delivery, but you won't be required to use it. Simple Delivery will be required for large letters. So where is the opt out for letters ?

[vinylscot]

With respect, your listings do not look like a private seller selling off his/her collection.

You could completely avoid all the hassle with Simple Delivery, by registering properly as a business seller. This will also result in you complying with consumer law, as well as eBay's own terms and conditions.