[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
Thank you for being not only a wonderful grandma, but also a great friend. You have always been such an excellent role model for me, and I have known for as long as I can remember that I can talk with you about anything. You have listened to me, loved me, and supported me at all times. Not only that, but we sure have had some fun times and great laughs together!
Thank you for your constant love, Grandma, and for all the memories that I will hold in my heart forever.
With much love,
[Signature]
[Sender's first and last names]