Intercalation of spin-bearing 3d transition metals into nonmagnetic transition metal dichalcogenides (TMDs) offers an effective route to induce and control magnetism in layered materials. However, progress has been hindered by the lack of scalable and controllable synthesis methods, which are mainly based on chemical vapor transport and subsequent mechanical exfoliation. Here, we utilize a scalable atmospheric pressure chemical vapor deposition (APCVD) approach to intercalate Cr into the van der Waals (vdW) gaps of 2H-NbS₂. Energy-dispersive X-ray spectroscopy shows that the produced hexagonal crystals closely match the Cr_1/3NbS₂ stoichiometry, a chiral helimagnet of interest for spintronic applications. Transmission electron microscopy and Raman spectroscopy further verify the successful preparation of Cr_1/3NbS₂ with a dominantly ordered 3×3 Cr superlattice. Linear/circular polarized Raman measurements together with density functional theory calculations were utilized to assign vibrational mode symmetries in Cr_1/3NbS₂, serving as clear guidelines for future studies. Magneto-transport measurements revealed a strong dependence of the magnetic properties of Cr_1/3NbS₂ on the thickness. Interestingly, crystals thinner than the helix pitch deviate from the conventional in-plane helical structure, which gives rise to an out-of-plane magnetic component under an applied perpendicular magnetic field. This work introduces a scalable route for synthesizing magnetic intercalated TMDs and provides a platform for exploring the thickness–property relationships in low-dimensional chiral helimagnets.