TenantFont.sizeBytes is the size of the uploaded font file in bytes, measured from the decoded base64 payload. The upload endpoint rejects files larger than MAX_TENANT_FONT_SIZE_MB with a 413 font_too_large response before writing anything, and records this size on the row for files that pass. It is returned in the GET font listing so an admin can see how much space a tenant's fonts occupy, and it is updated in place when a font of the same family and weight is re-uploaded.
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TenantFont.sizeBytes
The byte size of an uploaded font file.