It is classified as being carved in runestone style Pr3, or Urnes style.

U 154 is classified as being carved in runestone style Pr3.

The inscription is classified as being carved in runestone style Fp.

It is classified as being carved in runestone style Fp.

The inscription is classified as being carved in runestone style Pr4, or Urnes style.

The inscription has been classified as being carved in runestone style RAK.

This runestone is classified as being carved in either runestone style Pr2 or Pr3.

The inscriptions are classified as being carved in the runestone style Pr3, which suggests that they were carved in the period 1050-1080.

It is classified as being carved in runestone style Pr1, but the runemaster is considered to have had little experience in the craft.

U 991 is classified as being carved in either runestone style Pr3 or Pr4.