NdFeb Block Magnet segmentation by application isolates four dominant end‑use categories—medical imaging, particle accelerators, magnetic separation, and research & development—each driving a distinct share of total revenue. Medical imaging, principally magnetic resonance imaging (MRI) systems, commands the largest slice of the market, approximately 45 % of sales, because high‑field scanners rely on the superior energy product of sintered block magnets to achieve stable, homogeneous fields. Particle accelerators, employed in both research facilities and industrial processing, represent roughly 30 % of the market; the requirement for compact, high‑gradient focusing elements favors hybrid and bonded blocks that balance field strength with thermal management. Magnetic separation, used in mining and recycling, accounts for about 15 % of revenue, where cost‑effective bonded magnets dominate due to large‑area, low‑field applications. The remaining 10 % is allocated to research and development laboratories that procure customized block geometries for prototype testing, often selecting hybrid configurations to explore performance limits. These proportional allocations illustrate how application‑specific performance criteria and cost structures collectively define the overall NdFeb Block Magnet market size.