Although this cup does not have a signature or mark we are fairly certain this is a Samson Bright Floral Pot de Creme Cup. The cup is hand painted and no transfers have been used. The design is done in striking shades of bright yellow, bright blue, red and touches of green. If you do a search through our museum for "Samson" pot de creme cups you'll see several examples that have a similar design and feel.
Unfortunately the lid on this cup was broken and a partial repair was made. Even so it is a beautiful and colorful piece of porcelain.
The dimensions if the cup is approximately 3 1/2" wide including the handle and 3 1/2" tall up to the top of the finial on the lid.