If you want a GIANT dinnerplate dahlia, Wanda's Capella is PERFECT. It's bright yellow blooms make you smile.
 
Colour: Yellow
Form: Informal Decorative/Dinnerplate
Bloom Size: 10”
Plant Height: Medium (3' to 4')
 
Oops... skipped picture day! If you would like to see what this variety looks like, below is the link to google images.
 
wanda's capella dahlia - Google Search