Just to add - depending on where you source your guard from, might already be done… I bought one from WD and it’s great. Foil covered on rear, superb quality, perfect fit, faster than advertised delivery. Assuming four string Squier then https://www.wdmusic.co.uk/pickguards-c62/fender-basses-c111/squier-by-fender-deluxe-dimension-bass-iv-c397
I rang them with questions and they were super helpful too. And good choice with the Dimension - they’re killer basses!