A method of video decoding includes receiving a coded video bitstream including a current picture. The method includes determining a predetermined condition associated with signaling data included in the coded video bitstream. The method includes determining, based on the predetermined condition, a size of an index included in the signaling data for a candidate list of vector predictors based on a number of merge mode candidates and a number of intra block copy (IBC) candidates. The method includes constructing the candidate list with vector predictors. The method includes retrieving a vector predictor from the candidate list in accordance with the index that has a value that does not exceed the determined size of the index. The method further includes decoding the current block in accordance with the retrieved vector predictor.