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A cashier counts money at Macy's in Herald Square, New York, Nov. 28, 2013. Reuters

Determining who to tip and just how much to give during the holidays can be tough. Christmas tips vary depending on what services are done and how often they're used. This handy guide breaks down exactly how much to give and to whom this holiday season.

Supers and doormen: Tipping building staff like superintendents, doormen and concierges depends on the apartment building, the quality of services and the length of time in residence. New York City real estate advice company Brick Underground suggests tipping anywhere from $75 to $175 for supers and $25 to $150 for doormen and concierges. Those ranges are for apartment dwellers in the Big Apple, so sticking to the lower end of the spectrum might be appropriate in other, less expensive cities.

Gardeners and landscapers: A holiday tip for a gardener will depend on how often the service is used and what services are performed. Real Simple recommends tipping anywhere from $20 to $50 depending on those factors.

Babysitters: Care.com recommends giving a full-time nanny at least one week's salary as a holiday bonus. For part-time babysitters, depending on how often they work, a gift or gift card ranging from $25 to $50 is suitable.

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Workers load packages at a FedEx facility in Marina Del Rey, California, Dec. 12, 2011. Reuters

Postal workers: United States Postal employees have guidelines they're required to follow when it comes to accepting gifts. The ethical conduct code only allows mail carriers to accept a gift of $20 or less from a customer, and checks and gift cards can never be accepted in any amount.

Hairdressers and nail technicians: For beauty professionals visited on a regular basis, Beauty.com suggests adding at least an additional 10 percent to an existing tip for visits during the holiday season. For those who visit salons more frequently, the tip can range up to the full price of a service.

Dog walkers and groomers: Consumer Reports recommends tipping the cost of one session for a groomer or one week's pay for a dog walker, depending on the service performed and how satisfied the customer is.

Housekeepers: Care.com suggests giving housekeepers and cleaners a holiday bonus ranging anywhere from half to the full amount of what they usually charge for a service.