Skeletal restorations of six Brachiosaurus specimens. From top to bottom:
OMNH 01138 ("OMNH Metacarpal"): Known from a single metacarpal originally refered to Camarasaurus. It was later assigned to Brachiosaurus sp. Based on its gracility. Since the holotype specimen preserves no metacarpals, scaling was done using the Potter Creek specimens.
BYU 9462 ("Ultrasauros macintoshi," Dry Mesa Quarry Material): Originally described as "Ultrasaurus", this scapulocoracoid was referred to Brachiosaurus sp. after "U. macintoshi" was determined to be a chimera of Supersaurus and brachiosaur material. Despite being hailed as the largest dinosaur, BYU 9462 is actually likely smaller than the holotype, scaling its 510 mm coracoid against the holotype’s 540 mm coracoid.
Jensen/Jensen Quarry Material: Among other material, Jensen reports having found a 2.75m long brachiosaur rib.
FMNH P 25107 (Holotype): This is the most complete adult Brachiosaurus specimen known. Dorsal vertebrae 6-12 are preserved, in addition to a sacrum, two caudals, a rib, a coracoid, a humerus, and a femur.
USNM 21903 ("Potter Creek Humerus"): Scaled after the holotype, this represents the largest known Brachiosaurus specimen. This humerus has never illustrated in lateral view in detail.
BYU 4744 ("Potter Creek Material"): This specimen includes the rest of the Potter Creek Material. The full extent of the ilium’s preservation is unknown, since it was restored prior to preparation.Other specimens also exist, but do not overlap with any other ‘’Brachiosaurus’’ specimens

USNM 5730 ("Felch Quarry Skull"): This is the skull that Marsh used for his Brontosaurus restoration. It is nearly complete but crushed, and has been drawn after Carpenter’s skull diagram. A 99 cm cervical was also present at the dig site but was destroyed during excavation.
BYU 12866 and 12867 ("BYU Cervicals"): C5 and C10, respectively. These are some of the few brachiosaur cervicals that are known from the Morrison Formation.
KUVP 142200, 129724, 133862, 144767, and 129724 ("Bigfoot"): A nearly complete brachiosaur pes found alongside skeletons of Camarasaurus. It currently represents the largest known sauropod pes.The scale bar is 4 meters long, with each increment representing 1 meter. White represents known material, light gray represents known but inadequately figured material, and dark gray represents unknown material. Human silhouette from File:Silhouette of man standing and facing forward.svg, licensed under CC0.
References

Taylor, M.P. (2009). "A re-evaluation of Brachiosaurus altithorax Riggs 1903 (Dinosauria, Sauropoda) and its generic separation from Giraffatitan brancai (Janensh 1914)". Journal of Vertebrate Paleontology 29 (3): 787–806. DOI:10.1671/039.029.0309.
Riggs, E.S. (1904). "Structure and relationships of opisthocoelian dinosaurs. Part II. The Brachiosauridae". Geological Series (Field Columbian Museum) 2 (6): 229–247.
Bonnan, M.F. (2004). "First occurrence of Brachiosaurus (Dinosauria, Sauropoda) from the Upper Jurassic Morrison Formation of Oklahoma". PaleoBios 24 (2): 12–21.
Curtice, B. (1996). "A re-assessment of Ultrasauros macintoshi (Jensen, 1985)". Museum of Northern Arizona Bulletin 60: 87–95.
Jensen, J.A. (1987). "New brachiosaur material from the Late Jurassic of Utah and Colorado". The Great Basin Naturalist 47 (4): 592–608.
Carpenter, K. (1998). "Preliminary description of a Brachiosaurus skull from Felch Quarry 1, Garden Park, Colorado". Modern Geology 23 (1–4): 69–84.
Wedel, Mathew J. (2000). "Osteology, paleobiology, and relationships of the sauropod dinosaur Sauroposeidon". Acta Palaeontologica Polonica 45: 343–388.
 (2018). "The real Bigfoot: a pes from Wyoming, USA is the largest sauropod pes ever reported and the northern-most occurrence of brachiosaurids in the Upper Jurassic Morrison Formation". PeerJ 6: e5250. DOI:10.7717/peerj.5250. PMID 30065867. PMC: 6063209.
Own work
Slate Weasel