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.
Time: One important factor that we should consider is time because we need to keep things ready before our guest visit the venue and if unprofessionals are working then it is sure to consume more time and results can only get satisfactory. But, when you hire professionals with decade experience they can give the best decoration depending on the type of occasion.