N.H. Rev. Stat. Ann. § 658:26

The town or city clerk shall cause the sample ballots provided for in RSA 656:18 and 656:28 to be posted outside the guardrail in the polling place. For the general election, he shall cause 2 sample ballots to be posted. For the state and presidential primaries, he shall cause 2 sample ballots of each party to be posted. At least one sample ballot for the general election and one sample ballot of each party for each of the primaries shall be posted no higher than 48' so as to be convenient for those voters in wheelchairs.