In the chancel is a C13 south doorway with nook shafts.
Of c.1300 is the double piscina and east window: this has good net tracery, inner shafts of marble and image niches in the buttresses at the eastern corners.
The north chancel doorway of c.1300 leads into a rebuilt c19 vestry.
The chancel walls were raised for remodelled windows, perhaps in early C16.
5-bay nave arcade: the south side is of mid C14 character.
2-light mid C14 windows in south wall, and at the south-east corner of the aisle is a niche for the image of Our Lady of Wool pit in the window reveal.
The tall chancel arch has similar mouldings and pier capitals, and the north arcade is of similar but later C14 character.
Early C15 north aisle windows and doorway.
Circa 1439-51, the nave clerestory was built with a fine double-hammerbeam roof in 10 bays.
The roof is heavily moulded and brattished, the braces all have carved spandrels, and a canopied figure stands beneath each truss.
Aisle roofs also renewed 1439-51: these are of similar character to the nave roof.
Beneath each main truss are more canopied figures but at the intermediate trusses the principal rafter is carved in the form of a pair of downward-looking angels.
The chancel roof was rebuilt in C17, in 5 bays of archbraced collarbeam trusses
the C15 cornice remains.
The south porch, added also c.1439-51 is one of the finest in Suffolk.
The interior is fan- vaulted with well-carved bosses at intersections.
The inner doorway has a crocketted hoodmould and a frieze of carved crowns, fleurons and lions heads in a casement.
In 1702 the medieval tower fell, being repaired in 1708
C15 rood screen with rich painting at the base, mainly restored: the tracery is complete, and part of the roodbeam remains with some decoration at the upper level dated 1750.
At the base is a pair of early C17 gates with balusters and strapwork at the head.
In the chancel is one fine C15 stall surviving from a series and with a matching buttressed book rest, but without its misericord.
Octagonal pulpit on a marble pillar, 1883 by George Gilbert Scott.
Fragments of medieval glass in several chancel windows.