You could create an arrangement for any size vase, the larger the vase, the more flowers and greens to use. For Christmas time, use red, white and maybe even green flowers (like green button mums). Also choose from a variety of greens and evergreens out there. Accent a red rose in a bud vase with some baby's breath and cedar. Deep red alstroemeria are especially beautiful. There are many other flowers that would be perfect to use for Christmas arrangements, the link below will take you to a complete list of flowers, foliage, and evergreens for Christmas floral design.
There are different types of flowers decorations used in a wedding like centerpieces kept on the table tops for the purpose of decoration. Beautiful flower decoration also symbolizes that the guests are happily welcomed. Planning is one of the essential ingredients to pull off a gorgeous flower decoration for a wedding wherein it is vital to appoint a florist who can beautifully decorate the venue. It is a florist responsibility to make the venue romantic and beautiful whilst keeping the decoration in synch with the budget allocated by the client. It is always not necessary to go for fancy and exorbitant wedding decoration, you can always opt for simple yet stylish wedding flower decoration that would work to your advantage and make the reception look truly romantic and wonderful. There is always a choice to select from a wide range of seasonal flowers and make the most beautiful arrangements from them. Flower decorations are not only limited for decoration purpose; they can as well be worn as accessories too. You should ask your florist to make a sketch or show you a sample arrangement that would be done at the wedding so that you can give your inputs accordingly. You can also use topiaries and the bucket tied arrangements which are big flowers or a bunch of flowers potted in a vase and use it as a decorative item at the wedding reception.