Hisham bin Urwah (may Allah have mercy on him) narrated from his father that in the time of the Messenger of Allah (peace and blessings be upon him), a thief's hand was not cut off for less than the price of a hajafah or a turs (these are names of shields), and each of them is of value.
And in the time of the Prophet (peace and blessings be upon him), a thief's hand was not cut off for a trivial thing.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السرقة / 17166