Detail 01
4/4 size
Cut for a full-size cello. Smaller instruments have shorter string lengths and need the matching size.

Independent shopping perspective
Single D string for 4/4 cello, from Thomastik's Spirocore line. For replacing one string rather than the whole set.

Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 01
Cut for a full-size cello. Smaller instruments have shorter string lengths and need the matching size.
Detail 02
One of the four. Buying singles lets you replace what is worn instead of the whole set.
Detail 03
Part of a named Thomastik series, so it pairs predictably with the other Spirocore strings on the instrument.
Detail 04
Cello strings are priced per string; a full set runs several times this.
Detail 05
A fresh D next to three worn strings will stand out until the others are replaced too.
Final check
Product questions
Straight answers to the questions shoppers most often ask about this product.
No. It is the D string only. A, G, and C are sold separately.
No. This is the 4/4 version. A 3/4 cello needs the 3/4 length.
You can. It will sound most consistent alongside the rest of the Spirocore set.
Replace it when it goes dull or false. Heavy daily playing wears strings far faster than occasional practice.