This depends on the holster manufacturer, style and model of holster. Many of the regular holsters will fit the 226-225 & 220 Sig. But once again it depends on the style of holster from the manufacturer. If you Google P-225 Sig Holster. The first couple of sites listed have holsters pictured and they will each advise what they fit including your P225.
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
Today, we need a nation of Minutemen, citizens who are not only prepared to take arms, but citizens who regard the preservation of freedom as the basic purpose of their daily life and who are willing to consciously work and sacrifice for that freedom."
-- John F. Kennedy