Ohio Rev. Code Ann. § 1319.02
(A) As used in this section:
(D) A commitment to pay attorneys' fees is enforceable only to the extent that it obligates payment of a reasonable amount. In determining the amount of attorneys' fees that is reasonable, all relevant factors shall be considered, including but not limited to, the nature of the services rendered, the time expended in rendering the services, the amount of money and the value of the property affected, and the professional skill and expertise of the attorney or attorneys rendering the services. Unless a court has been requested to make a determination of the amount of attorneys' fees that is reasonable and finds to the contrary by a preponderance of the evidence, the following are deemed reasonable amounts: