Neckties are marked inside where?

Neckties are marked inside the neck loop. This is the correct answer because the neck loop is the part of the tie that goes around the collar of the shirt, and it is the most suitable and discreet location for manufacturers to include size and care instructions without being visible when the tie is worn. Placing the mark here ensures that it does not detract from the overall appearance of the tie, allowing for a clean presentation when it is properly worn. This placement is significant for ensuring a proper fit and ensuring the tie is used correctly, as it relates to how the tie is adjusted on the wearer. The other options, such as marking in the collar, near the pin, or on the end, would not serve the function of the mark as effectively, as they could interfere with the tie's aesthetic or even its function.