Bovine lumbar vertebrae

 Bovine lumbar vertebrae measuring 270 mm widest.

135 highest measurement

95mm front to back max length

Bovine atlas vertebrae

 This bovine atlas vertebrae measures 180mm widest and 100mm highest.

 Weighing 325 grams

 If other information is accurate this is a very big atlas for the bovine species

The hole that  the spinal cord would have been or the  ( foramen) measures 50mm top to bottom 50mm across.