The very nature of a Tazeer punishment is that the punishment is not fixed and its upto the Qadi (judge) to impose something that will be sufficient as a deterrent while suiting the gravity of the crime.
If the Qadi sentences the person to flogging, they can be no more than 10 lashes, according to this Hadith:
The Prophet (ﷺ) said, "No Punishment exceeds the flogging of the ten
stripes, except if one is guilty of a crime necessitating a legal
punishment prescribed by Allah." [Saheeh Bukhari]
The section on Tazeer Punishments in the Shafi, Minhaj-Al-Talibin:
Contraventions that are not punishable with some definite prescribed
penalty, and involve no sort of expiation, should be punished at the
discrétion of the court either by imprisonment, whipping, a slap, or a
reprimand. The nature and gravity of the punishment are at the
discrétion of the Sovereign or his deputy the judge ; except that,
according to some authorities a simple reprimand is not sufficient if
the offence is committed against men, but only when it is committed
against God. Whipping should always be under twenty strokes in the
case of a slave, and forty in the case of a free man ; though some
think that twenty is the limit for any person. Moreover, the principle
that a punishment at discrétion should always be below the minimum
pronounced as a definite prescribed penalty extends to ail
contraventions.
Section on Tazeer punishments in Hanafi, Hidayah:
The maximum limit of ta`zir is thirty-nine lashes, while the minimum
is three. Abu Yusuf (God bless him) said that the maximum for tazir is
seventy-five lashes. The basis for it are the words of the Prophet
(God bless him and grant him peace), "One who reaches the level of the
hadd in matters other than the hadd is a transgressor." When
enforcement of the hadd is obstructed, then Abu Hanifah and Muhammad
(God bless them) take into account the minimum number for the hadd,
which is the hadd for a slave in the case of qadhf, and they adopted
this. It is forty lashes and they reduced one lash from it. Abu Yusuf
(God bless him) considered the minimum hadd for freemen, because the
original rule is that of freedom, and then reduced one lash from it,
according to one narration from him, which is also the view of Zufar,
and is based on alalogy. In the narration that we have mentioned, he
reduced five lashes, and this is reported from Ali(God be pleased with
him), and he followed his opinion. THereafter, he determined the
minimum in the Book as three lashes, as what is less than that does
not serve as deterrent. Our Masahaik(jurists) have determined that the
minimum is what the imam considers to be so, therefore, he determines
it to be the minimum that will act as a deterrent, because it differs
for different people.
If the imam is of the opinion that he should combine with lashes,
awarded as tazir, imprisonment as well, he may do so, because it is
suitable by way of tazir. The shariah has laid it down in general
terms,, therefore, it is permitted that he deem imprisonment as
sufficient or he may combine it with lashes.