The phrase "average size per" is correct and usable in written English.
It can be used when discussing measurements or statistics that are calculated on a per-unit basis, such as per person, per item, or per category.
Example: "The average size per household in the city has increased over the last decade."
Alternatives: "mean size for each" or "average dimension per".
Based on the results of these queries, the amount of storage required was calculated using an average size per image.
Between 2007 and 2013, the enclosures increased by 38%% from 26 to 36 and their average size per enclosure tripled from approximately 0.4 to 1.3 ha.
Moreover, the relative cellular flat surface area was measured with the Image-Pro-Plus software (Media Cybernetics, Rockville, MD, USA), and the results indicated that the average size per cell was reduced by approximately 20% compared to the control (Figure 1A,B, P < 0.05).
The average size per starch grain decreased from 1.2 μm2 at ambient temperature to approximately 0.5 μm2 at both elevated temperatures I and II (Table 1, Figure 3A-D).
The estimation was done by dividing 250 kb by the average size per gene (4.1 kb) in Arabidopsis, which is derived by the division of the total length in kb by the number of genes in the Arabidopsis genome.
Because the average insert size was 155 kb and the average valid bands were 80.2 per clone, the average size per band was estimated to be 1,933 bp.
Average sizes per reproductive group (juvenile, vegetative, female, male or cosexual) were also calculated.
And its average basket size per-order of $110 is more than three times the in-store average for purchases.
The portion of voters with an unknown voting preference within each group ranged from four to fourteen per cent, with the average size being eight per cent.
Right now, the company says it is processing 150,000 transfer each month, with an average size of $1,800 per transaction.
Exon number (231) and their average size (170 bp) per candidate gene varied also significantly from 17 bp (AG) to 2,600 bp (BAM1) and exon number from 1 (CLAS, LAS) to 25 (TPL).
