A concave-convex pattern flower vase in blue colour typically has the following Features:

Blue colour: The vase is typically blue in colour, adding a calming and serene touch to any room.

Material: The vase can be made of various materials, such as ceramic, glass, or porcelain. Each material has its own unique texture and weight, contributing to the overall aesthetic appeal of the vase.

Size: The vase can come in different sizes, ranging from small to large. This allows for flexibility in the types of flowers or plants that can be used with the vase.