Due to rampant inflation, the follis was quickly reduced in weight and by the time of Constantine it was a shadow of its former self and barely contained any silver at all.
The follis was reintroduced as a large bronze coin (40 nummi) in 498, with the coinage reform of Anastasius.

Reverse:
Die Orientation: -
Weight: 17.25 g

Reverse: + IhSЧS/XRISTЧS/bASILЄЧ/bASILЄ· in four lines across field; above and below; ornate As.
Die Orientation: -
Weight: 8.29 g

Reverse: Large M, ANNO at left, cross at top, B below, XVI at right, ΘEC in exergue
Die Orientation: 7 H
Weight: 3.42 g
Byzantine Empire
Heraclius regnal year 16 = 624-625 AD
Second officina in Thessalonica mint

Reverse: +LЄOҺ/ЄҺ ӨЄO ЬA/SILЄVS R/OmЄOҺ in four lines.
Die Orientation: -
Weight: 3.86 g

Reverse: +LEOh Eh ΘEO bA-SILEVS R-OMEOh, legend in four lines.
Die Orientation: -
Weight: 5.58 g
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Reverse: +LEOh Eh ΘEO bA-SILEVS R-OMEOh / legend in four lines
Die Orientation: -
Weight: 7.87 g

Reverse: Large M, ANNO to left, cross above, regnal year XX (20) right, officina letter Δ below. Mintmark THEUP'.
Die Orientation: 12 H
Weight: 10.54 g

Reverse: MP-OV - Facing bust of the Virgin Mary, nimbate and wearing pallium and maphorium.
Die Orientation: 6 H
Weight: 6.39 g