For example, in the second case, the wireless device may determine the size of the new DCI format based on a size of the other DCI format(s) (e.g., a size of DCI format 1_0). The new DCI format may be zero-padded (e.g., zeros are added) to match the size to the other DCI format(s). Among the other DCI format(s), if there are more than one DCI sizes to support the other DCI format(s), the smaller DCI size (or the larger DCI size) is chosen for the new DCI format(s). The wireless device may not expect more than one DCI size for the other DCI formats associated with the SS. In an example, the second case may comprise a wireless device is configured with the new DCI format(s) along with the other DCI format(s) for one or more search spaces, wherein the wireless device may monitor the new DCI format(s) and the other DCI format(s) via the one or more search spaces. For example, the second case may comprise that the wireless device may not support one or more DCI sizes of the new DCI format(s) by an UE capability. With the one or more DCI sizes additionally, a total number of DCI sizes may exceed the UE capability. For example, the second case may comprise that a base station may configure to determine the one or more DCI sizes of the new DCI format(s) by a DCI size alignment to the other DCI format(s).